Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Physics > Definitions > Flashcards

Definitions Flashcards

(62 cards)

Start Studying
1
Q

Principal of Conservation of Energy

A

Energy may be transformed from one form into another, but it cannot be created or destroyed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Principal of Conservation of mechanical energy

A

The total amount of mechanical energy which the bodies in a system posses is constant, provided no external forces act

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Kirchhoff’s first law

A

At any junction or point of the circuit, the sum of the current going in is equal to the sum of the current going out

Conservation of charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Kirchhoff’s second law

A

The emf of a circuit is equal to the potential difference in any closed loop of a circuit

Conservation of voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Ohm’s law

A

V is proportional to I as on a graph the line would be a straight line through the origin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Volt

A

Energy per unit charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Coulomb

A

One amp per one second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The charge of an electron

A

1.6*10^-19

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Charge

A

A property of protons and electrons equivalent to the product of current and time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Potential difference

A

Work done BY each unit of charge in a component converting electrical energy into other forms of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Electromotive force

A

Work done ON each unit of charge in a component converting energy from other forms into electrical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Resistance

A

The opposition to the flow of current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The ohm

A

A. Opponent has a resistance of one ohm when a potential difference of one volt is required to push a current of one amp through the component

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Power

A

The rate of work done Or the work Done per unit time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Kilowatt-hour

A

The energy used by an appliance with a power rating of 1KW in one hour equivalent to 3.6MJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Electron density

A

The number of free electrons per unit volume of a conductor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Antiphase

A

When the particles of two waves oscillate in the exact opposite path, when one reaches maximum positive amplitude the other reaches maximum negative amplitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Archimedes’s principle

A

The upthrust on an object in a fluid is equal to the weight of the fluid it displaces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Braking distance

A

Distance travelled by a vehicle from the time brakes are applied until the vehicle stops

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Brittle

A

A property of a material that does not show plastic deformation or become deformed at all when under stress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Capacitor

A

A component that stores charge, consists of two plates separated by an insulator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Coherence

A

Two waves that are coherent have a constant phase difference

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Constructive interference

A

Superposition of two waves in phase so that the resultant wave has greater amplitude than the original waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Coulomb

A

The derived SI unit of electrical charge, 1 coulomb of electric charge passes a point in one second when there is an electric current of one ampere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Destructive interference
Superposition of two waves in antiphase so that the waves cancel each other out and the resultant wave has a smaller amplitude than the original wave
26
Diffraction
Waves spreading out as they pass through a gap or around an obstacle and spread out
27
Diode
A semiconductor component that allows current only in one particular direction
28
Displacement
The distance travelled in a particular direction - it is a vector so can have positive and negative values
29
Displacement in waves
The distance from the equilibrium position in a particular direction
30
Drag force
The resistive force exerted by a fluid on an object moving through it
31
Ductile
Property of a material that has a large plastic region in a stress-strain graph
32
Elastic deformation
A reversible change in the shape of an object due to a compressive or tensile force
33
Elastic limit
The value of stress or force beyond which elastic deformation becomes plastic deformation and the material will no longer return to its original shape
34
Elastic potential energy
The energy stored in an object because of its deformation
35
Electrolyte
A liquid containing ions that are free to move and so to conduct electricity
36
Electromagnetic spectrum
The full range of frequencies of electromagnetic waves, from gamma rays to radio waves
37
Electronvolt
A derived unit of energy used for subatomic particles and photons, defined as the energy transferred to it from an electron when it passes through a potential difference of 1 volt 1eV=1.6x10^-19
38
Energy
The capacity for doing work, measured in joules
39
Equilibrium
A body is in equilibrium when the net force and net moment acting in ut are zero
40
Extension
The increase in length of an object when a tensile force is exerted on it
41
Filament lamp
An electrical component containing a narrow filament of wire that transfers electrical energy into heat and light
42
Force constant
A quantity determined by dividing force by extension (or compression) for an object obeying Hooke’s law
43
Free electron
An electron in a metal that is not bound to an atom and is free to move
44
Wave frequency
The number of wavelengths passing a given point per unit time
45
Fundamental frequency
The lowest frequency at which an object can vibrate
46
Gravitational potential energy (g.p.e)
The capacity for doing work as a result of an object’s position in a gravitational field
47
Harmonic
A whole-number multiple of the fundamental frequency
48
Hooke’s law
The force applied is directly proportional to the extension of the of the spring unless the limit of proportionality is exceeded
49
In phase
Particles oscillating perfectly in time with each other reaching maximum positive and negative amplitudes at the same time
50
Interference
Superposition of two progressive waves from coherent sources to produce a resultant wave with a displacement equal to the vector sum of the amplitudes of the two waves
51
Interference pattern
A pattern of constructive and destructive interference formed as waves overlap
52
Internal resistance
The resistance of a source of e.m.f. due to its construction, which causes a loss in energy/voltage as the charge passes through the source
53
Ion
An atom that has either lost or gained electrons so has a net charge
54
Kilowatt-hour
Energy in kWh can be calculated by multiplying the power in law bf the time in hours, it is a derived unit with 1kWh=3.6MJ
55
Kinetic energy
The energy associated with an object as a result of its motion
56
Longitudinal wave
A wave in Which the medium is displaced in the same lines as the direction of energy transfer
57
Mean drift velocity
The average velocity of electrons as they move through a wire
58
Moment
The product of a force and perpendicular distance from a pivot
59
Newton’s first law of motion
A body will remain at rest or continue to move with constant velocity unless acted upon by a resultant force
60
Newton’s second law of motion
The rate of change of momentum of an object is directly proportional to the resultant force and takes place in the direction of the force
61
Newton’s third law of motion
When two objects interact, each everts an equal and opposite force in the other
62
Node
For a stationary wave a point where the amplitude is always zero

Physics (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions