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PHY for ENG 1 Flashcards

1
Q

One slug is equivalent to how many kg?

A. 13.2 kg
B. 15.5 kg
C. 12.8 kg
D. 14.6 kg

A

D. 14.6 kg

1 slug = 14.6 kg
1 kg =1000 grams
1 kg = 2.2046 pounds 1 ounce = 28.35 grams 1 pound = 16 ounces
1 ton = 2000 pounds
1 ton = 907.19 kg
1 metric ton = 1000 kg

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2
Q

When the sound wave goes from air into
water, the quantity that remains
unchanged is its_.

A. speed
B. frequency
C. wavelength
D. amplitude

A

B. frequency

When the sound wave goes from air into
water, the quantity that remains
unchanged is its frequency.

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3
Q

An object closer to converging lens than its focal point always has an image that is

A. the same in size
B. smaller in size
C. virtual
D. inverted

A

C. virtual

(P4Eng1 FIGURE)

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4
Q

Doubling the distance between the
center of an orbiting satellite and the
center of the earth will result in what
change in the gravitational attraction of
the earth for the satellite?

A. one-half as much
B. twice as much
C. one-fourth as much
D. four times as much

A

C. one-fourth as much

(P4Eng1 FIGURE)

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5
Q

In calculating the upward force required to lift an object, it is necessary to use g if the mass is given in kg. The quantity of g is not needed if the weight is given in Ib because:

A. a kilogram is a unit of weight
B. a pound is defined as a measure of
force, a kilogram is not
C. the rules of measurement are different in
English system
D. the symbol for metric mass has the letter
“g” in it and the symbol for pound does not

A

B. a pound is defined as a measure of
force, a kilogram is not

In calculating the upward force required to lift an object, it is necessary to use g if the mass is given in kg. The quantity of g is not needed if the weight is given in Ib because a pound is defined as a
measure of force, a kilogram is not.
1 lbf = 4.4482 Newtons
1 Newton = 10,000 dynes

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6
Q

The work done by all forces except the
gravitational force is always equal to the
_____ of the system.

A. total mechanical energy
B. total momentum
C. total kinetic energy
D. total potential energy

A

C. total kinetic energy

The work-energy theorem states that
the work done on an object by the net
force is equal to the change in its kinetic
energy. Wnet = ∆K. E.

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7
Q

According to this law, “The force
between two charges varies directly as
the magnitude of each charge and
inversely as the square of the distance
between them.”

A. Law of Universal Gravitation
B. Coulomb’s Law
C. Newton’s Law
D. Kepler’s Law

A

B. Coulomb’s Law

“The force between two charges varies directly as the magnitude of each charge and inversely as the square of the distance between them.”
This is known as Coulomb’s Law.

Ohm’s Law states that the current
flowing in an electrical circuit is
directly proportional to the applied
voltage (V) and inversely proportional to the equivalent resistance (R).

Kirchoff’s Current Law (KCL) states
that the Algebraic Sum of the
currents entering and leaving any
node or junction is equal to zero.

Kirchoff’s Voltage Law (KVL) states
that the Algebraic Sum of the
voltage drops and the supply voltage in a closed path or loop is zero.

Ampere’s law states that the sum
over elements of the component of
the magnetic field along the direction of the element, times the element length, is proportional to the current I that passes through the loop.

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8
Q

It describes the luminous flux incidence per unit area and is expressed in lumens per square meter.

A. Radiance
B. Candela
C. Illuminance
D. Luminous Intensity

A

C. Illuminance

Illuminance is defined as the luminous
flux per unit area that reaches it. The
more luminous flux that reaches the
surface, the brighter it is lit.
Candela is the unit of luminous
intensity.
Luminous intensity is the candle power
of a source in any given direction. It is
equal to the luminous flux radiated per
unit solid angle in a direction.

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9
Q

The energy stored in s stretched elastic
material such as spring is

A. kinetic energy
B. internal energy
C. mechanical energy
D. elastic potential energy

A

D. elastic potential energy

(P4Eng1 FIGURE)

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10
Q

When the pitch of a note is raised,

A. its frequency decreases
B. its wavelength is increased
C. its frequency increases
D. None of these choices

A

C. its frequency increases

When the pitch of a note is raised its
frequency increases. Pitch is the
attribute of auditory sensation in terms
of which sound may be ordered on a
scale primarily related to frequency.

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11
Q

Which of the following is not true about
sound waves?

A. they travel faster in air than in solids
B. they produce interference
C. they are propagated as series if
compressions and rarefactions
D. they transmit energy

A

A. they travel faster in air than in solids

Molecules of in solids are packed
together tighter than in liquids and
gases, hence sound travels faster in
solids than in air.

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12
Q

Modern physics theories state that the
proton and neutron are made up of
these fundamental particles.

A. Quarks
B. Neutrinos
C. Muons
D. Photons

A

A. Quarks

Modern physics theories state that the
proton and neutron are made up of
quarks. All matter is made up of
fermions, classified into six kinds of
leptons and six kinds of quarks.

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13
Q

Sound waves in air are

A. either longitudinal or transverse
B. longitudinal
C. stationary
D. transverse

A

B. longitudinal

Sound waves are disturbances or
vibration whose energy must be
communicated into a medium. It is an
example of a longitudinal mechanical
wave that can travel through solid, liquid
or gas.

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14
Q

Normal range of the frequency of sound,
which the human beings can hear

A. less than 20 Hz
B. 20 Hz to 20 kHz
C. all of these choices
D. more than 25 kHz

A

B. 20 Hz to 20 kHz

Sonic waves are waves that can be
heard by human ear. These are waves
with frequencies from 20 Hz 20,000 Hz.

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15
Q

A wave in which the particles of the
material move up and down as the wave
goes from left to right is called:

A. longitudinal wave
B. standing wave
C. transverse wave
D. none of these choices

A

C. transverse wave

A wave in which the particles of the
material move up and down as the wave
goes from left to right is called
transverse wave.
Transverse waves are waves in which the vibration direction is perpendicular to the direction of the wave
propagation. Examples are wave on
string, water waves and
electromagnetic waves (light and radio
waves).

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16
Q

When waves go from one place to
another, they transport

A. energy only
B. frequency only
C. wavelength and matter
D. energy and matter

A

A. energy only

When waves go from one place to
another, they transport energy only.
Waves such as sound or light cannot
are not capable of transporting matter.

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17
Q

Echo is formed as a result of

A. refraction of sound
B. interference of sound
C. reflection of sound
D. diffraction of sound

A

C. reflection of sound

Echo is a reflected sound. Sound, like
light waves, can be reflected back when
it strikes a surface.

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18
Q

A decibel is a

A. measure of intensity level
B. musical instrument
C. measure of clarity of sound
D. highest frequency emitted by a tuning fork

A

A. measure of intensity level

A decibel is a measure of intensity
level.

Where:
SIL = sound intensity level in dB
I= sound intensity in W/m?
lo = minimum intensity for hearing

(P4Eng1 FIGURE)

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19
Q

What is another term for vector product
of two vectors?

A. Plus product
B. Vector product
C. Cross product
D. Dot product

A

C. Cross product

The vector product or cross product
of two vectors à and E is written Ã
× E and has magnitude equal to
the scalar quantity

(P4Eng1 FIGURE)

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20
Q

The scalar product of two perpendicular
vector is always _____

A. Equal to 1
B. Greater than 1
C. Equal to 0
D. Less than 1

A

C. Equal to 0

The
scalar product of two perpendicular vector is always equal to 0.
For perpendicular vectors, the angle
between them θ=90°.

(P4Eng1 FIGURE)

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21
Q

lron is what type of magnetic material?

A. diamagnetic
B. ferromagnetic
C. paramagnetic
D. non-magnetic

A

B. ferromagnetic

Ferromagnetic materials have relative permeability very much greater than 1.Common materials: iron, nickel, cobalt,ALNICO, permalloys, ferrites, and
magnetic oxides.

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22
Q

For a parallel-plate capacitor with plate
area “A” and plate separation “d”, the
capacitance is proportional to which of
the following?

A. A divided by d
B. d divided by A
C. A times d
D. A divided by d squared

A

A. A divided by d

Where:
C = Capacitance in Farad
A = area of each plate in sq. meters
d = distance between plates
k = permittivity of the material

(P4Eng1 FIGURE)

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23
Q

A standing wave is formed on a tightly stretched string. The distance between a node and an antinode is:

A. 1/2 wavelength
B. 1/8 wavelength
C. 1/4 wavelength
D. 1 wavelength

A

C. 1/4 wavelength

(P4Eng1 FIGURE)

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24
Q

When a physical property such as
charge exists in discrete “packets”
rather than in continuous amounts, the
property is said to be:

A. abrupt
B. non-continuous
C. quantized
D. discontinuous

A

C. quantized

When a physical property such as
charge exists in discrete “packets”
rather than in continuous amounts, the
property is said to be quantized.

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25
Q

A virtual image can be formed by one or
more of the following single mirrors?
Identify them.

A. plane mirror
B. concave spherical mirror
C. all of these choices
D. convex spherical mirror

A

C. all of these choices

Virtual images occur where light rays
only appear to have originated. A virtual image can be formed by plane mirror or spherical mirror.

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26
Q

The wave nature of light is
demonstrated by which of the
following?

A. the photoelectric effect
B. color
C. diffraction
D. the speed of light

A

C. diffraction

The wave nature of light is
demonstrated by diffraction. Diffraction
is the scattering or spreading of light
waves as they pass around the edge or
a small opening.

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27
Q

The collision between a photon and a
free electron was first explained by
which of the following scientists?

A. Heisenberg
B. Compton
C. Bohr
D. Einstein

A

B. Compton

The American physicist Arthur Holly Compton explained (1922; published 1923) the wavelength increase by
considering X-rays as composed of
discrete pulses, or quanta, of
electromagnetic energy.

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28
Q

The Tesla and the Gauss are units of
measure of:

A. magnetic flux
B. conductance
C. magnetic field strength
D. electrical current

A

C. magnetic field strength

The Tesla and the Gauss are units of
measure of magnetic flux density B.
One Tesla (T) corresponds to 10 Gauss.

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29
Q

G, the universal gravitational constant,
was measured experimentally by:

A. Cavendish
B. Copernicus
C. Newton
D. Kepler

A

A. Cavendish

The value of G was experimentally
determined by Lord Henry Cavendish
using a torsion balance. G = 6.673 x 10
N-m/kg.

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30
Q

The unit for the spring constant is

A. J
B. NS
C. Nm
D. N/m

A

D. N/m

Hooke’s Law in spring
Where:
F = external force
k = spring constant in N/m
x = elongation in m

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31
Q

The unit for the period is

A. T
B. s
C. m*s
D. /s

A

B. s

Period is the time it takes for one
complete cycle. Second (s) is the Sl unit
for time.

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32
Q

As a longitudinal wave moves through a
medium, the particles of the medium:

A. vibrate in a path perpendicular to the path
of the wave
B. vibrate in a path parallel to the path of
the wave
C. follow the wave along its entire path
D. do not move

A

B. vibrate in a path parallel to the path of
the wave

Longitudinal waves are waves in which the vibration direction is parallel to the direction of propagation.

33
Q

Two vibrating particles that are “out of
phase” differ in the phase of their
vibration by:

A. 1/4 cycle
B. 1/2 cycle
C. 3/4 cycle
D. 1 cycle

A

B. 1/2 cycle

(P4Eng1 FIGURE)

34
Q

An electroscope charged without
contacting a charged body is charged
by:

A. insulation
B. convection
C. induction
D. conduction

A

C. induction

An electroscope charged without
contacting a charged body is charged
by induction. Electromagnetic or
magnetic induction is the production of
an electromotive force across an
electrical conductor in a changing
magnetic field. Michael Faraday is
generally credited with the discovery of
induction in 1831, and James Clerk
Maxwell mathematically described it as
Faradays law of induction.

35
Q

The potential drop between the
terminals of a battery is equal to the
battery’s EMF when:

A. no current is drawn from the battery
B. the internal resistance of the battery is very
large
C. a very large current is drawn from the
battery
D. the resistance in the external circuit is
small

A

A. no current is drawn from the battery

The potential drop betweenthe
terminals of a battery is equal to the battery’s EMF when no current is drawn from the battery.
Take for example the circuit shown:

(P4Eng1 FIGURE)

The total voltage drop across the
external circuit equals the battery
voltage as the charge moves from the positive terminal back to 0 volts at the negative terminal.

36
Q

Two light rays will interfere
constructively with maximum amplitude
if the path difference between them is:

A. one-half wavelength
B. one-quarter wavelength
C. one-eighth wavelength
D. one wavelength

A

D. one wavelength

Pure constructive interference is
obtained when identical waves are in
phase. Pure destructive interference
occurs when identical waves are exactly
out of phase, or shifted by half a
wavelength.

37
Q

An interferometer constructed using a
half-silvered mirror inclined at a 45-
degree angle to the incoming beam

A. Michelson Interferometer
B. Spectrometer
C. Multiple Reflection Interferometer
D. Beam Splitter

A

A. Michelson Interferometer

The Michelson interferometer
(invented by the American physicist Albert A. Michelson,1852-1931) is a precision instrument
that produces interference fringes by splitting a light beam into two parts and then recombining them after they have traveled different optical paths.

(P4Eng1 FIGURE)

38
Q

The Michelson interferometer was
designed to study the nature of:

A. sound waves
B. sunlight
C. water waves
D. ether

A

D. ether

The Michelson interferometer is
employed in many scientific
experiments and became well known
for its use by Albert Michelson and
Edward Morley in the famous
Michelson-Morley experiment (1887) in
a configuration which would have
detected the earth’s motion through the supposed ether that most physicists at the time believed was the medium in
which light waves propagated. The null
result of that experiment essentially
disproved the existence of such an
ether.

39
Q

The Millikan experiment showed that
electric charge was:

A. positive
B. immeasurable
C. negative
D. quantized

A

D. quantized

In 1923 Millikan received the prestigious
Nobel Prize for Physics for his work
with the quantization of charge and
Plank’s constant. Millikan’s experiment
showed that electrical charge is
quantized, meaning that charge exists
only in little “pieces” of definite size.

40
Q

When a metal becomes a
superconductor, there is a tremendous
decrease in its:

A. density
B. electrical resistance
C. total volume
D. length

A

B. electrical resistance

A superconductor is a substance that conducts electricity without resistance when it becomes colder than a “critical temperature.”

41
Q

An x-ray photon collides with a free
electron, and the photon is scattered.
During this collision there is
conservation of:

A. momentum but not energy
B. both momentum and energy
C. energy but not momentum
D. neither momentum nor energy

A

B. both momentum and energy

An x-ray photon collides with a free
electron, and the photon is scattered.
During this collision there is
conservation of both momentum and
energy.
Law of conservation of momentum
states that when two bodies collide, the total momentum before impact is equal to the total momentum after impact.
Law of conservation of energy states that energy can neither be created nor destroyed but it can be transformed.

42
Q

Alpha particles are nuclei of:

A. oxygen
B. helium
C. nitrogen
D. hydrogen

A

B. helium

Alpha particle, positively charged
particle, identical to the nucleus of the helium-4 atom, spontaneously emitted by some radioactive substances,
consisting of two protons and two
neutrons bound together, thus having a mass of four units and a positive charge of two.

43
Q

The unit for frequency is

A. s
B. /m
C. s
D. Hz

A

D. Hz

Frequency is the number of times an
event occurs in a period of time. The SI unit of frequency is Hertz (Hz), named after the physicist Heinrich Hertz who demonstrated that the electromagnetic waves predicted by James Clerk
Maxwell actually exist.

44
Q

Which of the answers listed below best
completes the statement: The rate at
which any part of a wave travels from one place to another determines the wave’s:

A. period
B. propagation velocity
C. frequency
D. amplitude

A

B. propagation velocity

The rate at which any part of a wave
travels from one place to another
determines the wave’s propagation
velocity.
Frequency is the number of times an
event occurs in a period of time.
Period is the time it takes for one
complete cycle in seconds.
Amplitude is the height as depicted on a graph of a wave over time. An amplitude measurement can take the form of
peak, peak-to-peak, average, or RMS
quantity.

45
Q

When a charge moves through an electric circuit in the direction of an electric force it does which one of the following four things?

A. lose potential energy and gain kinetic
energy
B. gain potential energy and lose kinetic
energy
C. gain both potential and kinetic energy
D. lose both potential and kinetic energy

A

A. lose potential energy and gain kinetic
energy

46
Q

Two waves of equal wavelength will
interfere destructively most effectively under one of the following conditions.Will the interference be most effective when the waves are:

A. in phase and have equal amplitudes
B. 180 degrees out of phase and have
equal amplitudes
C. 180 degrees out of phase and have
unequal amplitudes
D. in phase and have unequal amplitudes

A

B. 180 degrees out of phase and have
equal amplitudes

Pure constructive interference is
obtained when identical waves are in
phase. Pure destructive interference
occurs when identical waves are exactly
out of phase, or shifted by half a
wavelength.

47
Q

A solid conducting sphere is given a
positive charge Q. How is the charge Q
distributed in or on the sphere?

A. It is concentrated at the center of the
sphere
B. Its density decreases radially outward from
the center
C. It is uniformly distributed on the
surface of the sphere only
D. It is uniformly distributed throughout the
sphere

A

C. It is uniformly distributed on the
surface of the sphere only

The charge Q in sa solid conducting spher is uniformly distributed on its surface.

48
Q

One joule of work is needed to move
one coulomb of charge from one point to another with no change in velocity.Which of the following is true between the two points?

A. The resistance is one ohm
B. The potential difference is one volt
C. The electric field strength is one newton
D. The current is one ampere

A

B. The potential difference is one volt

A potential of one volt has the capacity to do one joule of work in moving one coulomb of charge.

49
Q

What law describes the force between
two stationary electrically charged
objects?

A. Ampere’s law
B. Ohm’s law
C. Coulomb’s law
D. Kirchhoff’s Rules

A

D. Kirchhoff’s Rules

50
Q

The unit for wavelength is

A. /m
B. m/s
C. m*s
D. m

A

D. m

Wavelength is the distance (in meters)
traveled by an electromagnetic wave
during the time of one cycle.

51
Q

The energy associated with a photon
depends upon the photon’s:

A. velocity
B. amplitude
C. the brightness of the source from which it
comes
D. frequency

A

D. frequency

When making the transition from one
energy level to another, the atom
absorbs or emits a packet of
energy called a photon.

(P4Eng1 FIGURE)

52
Q

When a fast charged particle traverses a
dielectric medium at a velocity
exceeding the velocity of light in that
medium, radiation is emitted. This
radiation is known as:

A. Synchrotron radiation
B. point radiation
C. Cherenkov radiation
D. Bremsstrahlung

A

C. Cherenkov radiation

Cherenkov radiation is electromagnetic
radiation emitted when a charged
particle passes through a dielectric
medium at a speed greater than the
phase velocity of light in that medium.

53
Q

If viewed on an oscilloscope, the
loudness of a sound wave would be
associated with the wave’s:

A. velocity
B. frequency
C. wavelength
D. amplitude

A

D. amplitude

If viewed on an oscilloscope, the
loudness of a sound wave would be
associated with the wave’s amplitude.
The higher the amplitude, the louder the
sound.

54
Q

The kinetic energy of a stone falling
near the earth’s surface through a
vacuum increases with the:

A. square root of its velocity
B. cube of its velocity
C. square of its velocity
D. cube root of its velocity

A

C. square of its velocity

Kinetic energy is the energy possessed by an object because of its motion.

(P4Eng1 FIGURE)

55
Q

Which of the following does not travel in
a vacuum?

A. radio waves
B. gamma rays
C. sound waves
D. magnetic waves

A

C. sound waves

Sound waves are disturbances or
vibration whose energy must be
communicated into a medium. It is an
example of a longitudinal mechanical
wave that can travel through solid, liquid
or gas.

56
Q

An incident ray comes in parallel to the principle axis of a concave mirror. It is reflected:

A. through the center of curvature
B. back along the incident ray
C. through the focal point
D. at 30 degrees to incident ray

A

C. through the focal point

In concave mirrors, light rays parallel
to the principal axis will be reflected
through the focus. In reverse, light rays passing through the focus will be reflected parallel to the principal axis.

(P4Eng1 FIGURE)

57
Q

charges “positive” and “negative”?

A. James Chadwick
B. J. J. Thompson
C. Benjamin Franklin
D. Ernest Rutherford

A

C. Benjamin Franklin

It was Benjamin Franklin who named
the two kinds of electricity ‘positive’ and
negative’. He even collected electric
charges from thunderstorm clouds
through wet string from a kite.

58
Q

What SI prefix is used to represent
10^-18?

A. zepto
B. exa
C. atto
D. zetta

A

C. atto

(P4Eng1 Table)

59
Q

Sound waves are an example of what
type of wave?

A. compressional and longitudinal
B. transverse
C. compressional
D. longitudinal

A

A. compressional and longitudinal

Sound waves are disturbances or
vibration whose energy must be
communicated into a medium. It is an
example of a longitudinal mechanical
wave that can travel through solid, liquid
or gas.

60
Q

Two parallel wires carrying currents in
opposite directions will:

A. attract each other
B. not affect each other
C. cause an electric arc to form
D. repel each other

A

D. repel each other

The direction is obtained from the right hand rule. Note that two wires carrying current in the same direction attract
each other, and they repel if the currents
are opposite in direction.

61
Q

What are the units for intensity?

A. W/m
B. J
C. decibels
D. J/m

A

A. W/m

Intensity is the power carried by the
wave through a unit area perpendicular
to the direction of propagation of the
vibrating body. It has a unit of W/m.

62
Q

The four underlying equations in
electromagnetic theory are called:

A. Newton’s Equations
B. Maxwell’s Equations
C. Faraday’s Law
D. Einstein’s Equations

A

B. Maxwell’s Equations

Maxwell’s equations are a set of
coupled partial differential equations
that, together with the Lorentz force law,
form the foundation of classical
electromagnetism, classical optics, and
electric circuits.

63
Q

Which of the following phenomena
suggest that light may be a transverse
wave?

A. diffraction
B. polarization
C. reflection
D. photoelectric effect

A

B. polarization

Polarization is a property applying to transverse waves that specifies the geometrical orientation of the oscillations. In a transverse wave, the
direction of the oscillation is
perpendicular to the direction of motion
of the wave.

64
Q

When light is traveling through a
vacuum, what is the product of the
light’s wavelength and frequency equal
to?

A. Plank’s constant
B. wave number
C. momentum
D. speed of light

A

D. speed of light

(P4Eng1 FIGURE)

65
Q

The inverse of wavelength is referred to
as:

A. wave number
B. velocity
C. frequency
D. momentum

A

A. wave number

Wave Number (k) is a property of a
wave proportional to the reciprocal
of the wavelength.

(P4Eng1 FIGURE)

66
Q

What is the unit of power?

A. J/ms
B. J/s
C. decibels/s
D. W/s

A

B. J/s

Units of Power
1W=1J/s
1 hp=746 W=550 ft-lb/s
1 Btu/h =0.239 W

67
Q

One curie is equal to.

A. 3.7 x 10 disintegrations per second
B. the energy of an alpha-particle
C. mc^2
D. the square root of the binding energy

A

A. 3.7 x 10 disintegrations per second

1 Curie = 3.7 x 10 decays/sec = 3.7 x 10
Bq

68
Q

Who first explained the billiard-ball-like collisions photons make with the free electrons in a scattering material? He received the Nobel Prize in Physics in 1927 for this work.

A. Walther Bothe
B. Alfred Simon
C. Arthur Compton
D. Hans Geiger

A

C. Arthur Compton

The American physicist Arthur Holly Compton explained (1922; published 1923) the wavelength increase by
considering X-rays as composed of
discrete pulses, or quanta, of
electromagnetic energy. Compton was awarded the Nobel Prize in Physics for 1927 (sharing this with C. T. R. Wilson
who received the Prize for his discovery
of the cloud chamber method).

69
Q

At a point halfway between two
identical point charges, the electric field
is equal to:

A. its maximum value
B. half its maximum value
C. zero
D. pointing away from the two charges

A

C. zero

At the midpoint between two identical charges, the resultant electric field is zero.

70
Q

Which one of the following laws best describes the operation of an electric generator?

A. Ampere’s Law
B. Ohm’s Law for Conductors
C. Gauss’ Law
D. Faraday’s Law of Induction

A

D. Faraday’s Law of Induction

Faraday’s Law of Induction best
describes the operation of an electric generator. Faraday’s law of induction is a basic law of electromagnetism
predicting how a magnetic field will
interact with an electric circuit to
produce an electromotive force -a
phenomenon known as electromagnetic
induction.

71
Q

What is the phenomenon by which
wavefronts of propagating waves bend
in the neighborhood of obstacles?

A. Rarefaction
B. Refraction
C. Diffraction
D. Reflection

A

C. Diffraction

Diffraction is the scattering or
spreading of light waves as they pass
around the edge or a small opening.

Reflection is the bouncing of a wave. It occurs when light hitting the boundary returns into the materials.

Refraction is the bending of a wave. It is
the change in direction that occurs
when a wave of energy such as light passes from one medium to another medium of different density.

72
Q

The Weber and the Maxwell are units of
measure of:

A. magnetic flux
B. conductance
C. relative speed
D. electrical current

A

A. magnetic flux

Weber - Sl unit of magnetic flux equal to 10 lines or maxwells. Named after the German physicist Wilhelm Weber(1804-1891)
Maxwell - cgs unit of magnetic flux
equal to one line of force. Named after
the Scottish physicist, James Clerk
Maxwell(1831-1879)

73
Q

The total energy of a vertically vibrating
block attached to a spring is the same:

A. at all points in its motion
B. only at the equilibrium position
C. only at those points above the equilibrium
position
D. only at those points below the equilibrium
position

A

A. at all points in its motion

The total energy of the system of a
block and a spring is equal to the sum
of the potential energy stored in the
spring plus the kinetic energy of the
block and is proportional to the square of the amplitude. The total energy of the system is constant.

74
Q

What law gives the relationship between angles of incidence and refraction for a wave impinging on an interface between two media with different index ofrefraction?

A. Bragg’s Law
B. Snell’s Law
C. Hooke’s Law
D. Malus’ Law

A

B. Snell’s Law

Snell’s law states that a ray of light
bends in such a way that the ratio of the
sine of the angle of incidence to the
sine of the angle of refraction is
constant.
nisinθ1= nsinθ2

Malus’ Law states that the intensity of
light that passed through the polarizer is
equal to the product of the maximum
intensity and the square of the cosine of
the polarizing angle.
I = locosθ

Hooke’s Law states that the external force needed to stretch a spring to a distance x is given by:
F = kx

Bragg’s Law states that when the x-ray
is incident onto a crystal surface, its
angle of incidence, θ, will reflect back
with a same angle of scattering, θ.
nA = 2d sin θ

75
Q

The rate at which electrical energy is
used is measured in

A. joules
B. watts
C. volts
D. amperes

A

B. watts

The rate at which electrical energy is
used is called power and is expressed in
Watts.

76
Q

Which one of the following is the
advantage of connecting two dry cells in
parallel instead of in series? Is it
because the parallel arrangement:

A. has no internal resistance
B. gives twice the EMF of one dry cell
C. generates heat in an external circuit half as
fast as would a single cell
D. has half the internal resistance of a
single cell

A

D. has half the internal resistance of a
single cell

Connection two dry cells in parallel
instead of in series has half the internal
resistance of a single cell.

77
Q

Magnetic lines of force have all but
which one of the following
characteristics?

A. they go from the South-pole to the
North-pole of a magnet outside of the
magnet
B. they pass through copper
C. they pass through copper
D. they are most concentrated at the poles of
a magnet

A

A. they go from the South-pole to the
North-pole of a magnet outside of the
magnet

Magnetic lines of force go from North
Pole to South Pole of a magnet
outside the magnet.

(P4Eng1 FIGURE)

78
Q

Quarks come in how many flavors?

A. 3
B. 7
C. 6
D. 1

A

C. 6

There are six types, known as flavors, of
quarks: up, down, charm, strange, top,
and bottom.

GEAS (14 decks)

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