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Questions to practice Flashcards

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1
Q
A
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2
Q

What is the formula for calculating speed?

A

Speed = Distance / Time

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3
Q

True or False: Kinematics deals with the motion of objects without considering the forces acting on them.

A

True

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4
Q

Fill in the blank: The unit of force in the SI system is ______.

A

Newton

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5
Q

What is the principle of conservation of energy?

A

Energy cannot be created or destroyed, only transformed from one form to another.

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6
Q

What is the difference between elastic and plastic deformation?

A

Elastic deformation is reversible, while plastic deformation is permanent.

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7
Q

If an object is in free fall, what is the acceleration due to gravity?

A

Approximately 9.81 m/s²

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8
Q

What is Hooke’s Law?

A

F = kx, where F is the force applied, k is the spring constant, and x is the extension.

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9
Q

True or False: The work done on an object is equal to the change in its kinetic energy.

A

True

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10
Q

What does the term ‘strain’ refer to in materials science?

A

Strain is the deformation per unit length of a material.

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11
Q

What is the formula for kinetic energy?

A

Kinetic Energy = 1/2 mv², where m is mass and v is velocity.

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12
Q

What is the relationship between current, voltage, and resistance in an electrical circuit?

A

Ohm’s Law: V = IR, where V is voltage, I is current, and R is resistance.

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13
Q

Fill in the blank: The frequency of a wave is measured in ______.

A

Hertz (Hz)

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14
Q

What is the speed of light in a vacuum?

A

Approximately 3.00 x 10^8 m/s

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15
Q

True or False: Waves can transfer energy without transferring matter.

A

True

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16
Q

What are the two types of mechanical waves?

A

Transverse waves and longitudinal waves.

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17
Q

What is the formula for gravitational potential energy?

A

Gravitational Potential Energy = mgh, where m is mass, g is acceleration due to gravity, and h is height.

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18
Q

What is the definition of ‘stress’ in materials science?

A

Stress is the force applied per unit area.

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19
Q

Fill in the blank: The unit of power in the SI system is ______.

A

Watt

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20
Q

What is the principle behind lasers?

A

Lasers operate on the principle of stimulated emission of radiation.

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21
Q

True or False: In a transverse wave, particles move parallel to the direction of wave propagation.

A

False

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22
Q

What is the difference between series and parallel circuits?

A

In series circuits, current is the same through all components, while in parallel circuits, voltage is the same across all components.

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23
Q

What does the term ‘wave amplitude’ refer to?

A

Amplitude is the maximum displacement of a point on a wave from its rest position.

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24
Q

What is the formula for potential energy stored in a spring?

A

Potential Energy = 1/2 kx², where k is the spring constant and x is the displacement.

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25
Fill in the blank: The term 'refraction' describes the bending of a wave as it ______.
passes from one medium to another
26
What is the relationship between wavelength and frequency?
Wavelength is inversely proportional to frequency; as one increases, the other decreases.
27
What is the formula for calculating work done?
Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of motion.
28
True or False: Insulators allow electric current to flow easily.
False
29
What is an example of a non-renewable energy source?
Fossil fuels
30
What does Ohm's Law state?
The current through a conductor between two points is directly proportional to the voltage across the two points.
31
Fill in the blank: The process of converting a solid directly into a gas is called ______.
sublimation
32
What is the unit of electric charge?
Coulomb
33
True or False: All waves require a medium to travel through.
False
34
What is the critical angle for total internal reflection?
The angle of incidence above which total internal reflection occurs.
35
What is the relationship between energy and frequency for photons?
Energy = hf, where h is Planck's constant and f is frequency.
36
Fill in the blank: The bending of light around obstacles is known as ______.
diffraction
37
What is the difference between a conductor and an insulator?
Conductors allow the flow of electric current, while insulators do not.
38
What is the formula for pressure?
Pressure = Force / Area
39
True or False: The amplitude of a wave affects its energy.
True
40
What is the phenomenon that occurs when light changes speed as it enters a different medium?
Refraction
41
What is the primary purpose of a circuit breaker?
To prevent overload and protect electrical circuits.
42
Fill in the blank: The measure of how much a material resists deformation is called ______.
elasticity
43
What is the principle of superposition in wave theory?
When two or more waves overlap, the resultant wave is the sum of the individual waves.
44
True or False: Electromagnetic waves require a medium to propagate.
False
45
What is the effect of temperature on resistance in conductors?
Resistance typically increases with temperature.
46
Fill in the blank: The energy stored in an object due to its height is called ______.
gravitational potential energy
47
What is the formula for the frequency of a wave?
Frequency = 1 / Period
48
What is the role of a diode in an electrical circuit?
To allow current to flow in one direction only.
49
True or False: Sound waves are longitudinal waves.
True
50
What is the definition of 'work' in physics?
Work is done when a force causes displacement.
51
What is the relationship between voltage and current in a series circuit?
The total voltage is the sum of the voltages across each component.
52
Fill in the blank: The unit of frequency is ______.
Hertz (Hz)
53
What is the formula for the efficiency of a machine?
Efficiency = (Useful Output Energy / Total Input Energy) x 100%
54
True or False: The speed of sound is faster in air than in water.
False
55
What is the definition of 'momentum'?
Momentum is the product of an object's mass and its velocity.
56
What is the relationship between energy and mass according to Einstein's theory?
E = mc², where E is energy, m is mass, and c is the speed of light.
57
What is the significance of the critical angle in optics?
It is the angle of incidence above which total internal reflection occurs.
58
True or False: In a parallel circuit, if one component fails, the others will still function.
True
59
What is the principle of moments?
For an object in equilibrium, the sum of clockwise moments about a pivot equals the sum of anti-clockwise moments.
60
Fill in the blank: The energy associated with an object's motion is called ______.
kinetic energy
61
What is the formula for calculating the density of an object?
Density = Mass / Volume
62
What is the unit of measurement for electrical resistance?
Ohm
63
True or False: A wave with a longer wavelength has a lower frequency.
True
64
What is the difference between renewable and non-renewable energy sources?
Renewable sources can be replenished naturally, while non-renewable sources cannot.
65
Fill in the blank: The potential difference across a circuit is measured in ______.
Volts
66
What is the primary function of a transformer?
To increase or decrease the voltage in an AC circuit.
67
What is the definition of 'thermal energy'?
Thermal energy is the total kinetic energy of particles in a substance.
68
True or False: Electric current is the flow of electrons.
True
69
What is the formula for calculating the moment of a force?
Moment = Force x Distance from pivot
70
What is the definition of 'frequency' in wave mechanics?
Frequency is the number of waves passing a point per unit time.
71
Fill in the blank: The process of changing from a gas to a liquid is called ______.
condensation
72
What is the relationship between voltage and current in a parallel circuit?
The voltage across each component is the same.
73
True or False: A switch is used to open or close a circuit.
True
74
What is the formula for calculating the total resistance in a series circuit?
Total Resistance = R₁ + R₂ + R₃ + ...
75
Fill in the blank: The unit of energy in the SI system is ______.
Joule
76
What is the definition of 'wave speed'?
Wave speed is the distance traveled by a wave in a unit of time.

Physics (13 decks)

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