Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A2 Physics > Paper 1 Definitions > Flashcards

Paper 1 Definitions Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

Moment?

A

Force times perpendicular distance from pivot.

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

Couple?

A

A pair of of equal but opposite coplanar forces.

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

Threshold frequency?

A

Minimum frequency required to eject photoelectrons.

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

Work function?

A

Minimum energy required to remove an electron from the surface of a metal.

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

Photoelectric effect?

A

Emission of electrons from a metals surface when electromagnetic radiation is incident upon it.

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

Photoelectric emission?

A

Emission of electrons from a metal surface when light is directed at the surface.

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

Excitation?

A

An electron has gained enough energy to move to a higher energy level.

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

Ionisation?

A

When an electron gains enough energy to be completely removed from the atom from ground state.

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

Free fall?

A

Motion of an object when experiencing an acceleration of g.

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

Newton’s second law?

A

F = ma

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

Amplitude?

A

Maximum displacement from the equilibrium position.

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

Frequency?

A

Number of cycles per second passing a given point.

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

Wavelength?

A

Length of one whole wave cycle.

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

Phase?

A

Measurement of the position of a certain point along the wave cycle.

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

Phase difference?

A

Amount one wave lags behind the other.

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

Longitudinal wave?

A

Vibrations in same direction as energy transfer.

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

Transverse wave?

A

Vibrations perpendicular to the direction of energy transfer.

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

Elastic collisions?

A

KE conserved.

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

Impulse?

A

Change in momentum.

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

Stationary wave?

A

Superposition of two waves with the same frequency, moving in opposite directions.

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

Coherent sources?

A

Same wavelength and frequency, and a fixed phase difference between them.

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

Path difference?

A

Amount by which the path travelled by one wave is longer than the path travelled by the other wave.

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

Constructive interference?

A

Path difference is a whole number of wavelengths.

24
Q

Destructive interference?

A

Path difference is half a wavelength or more half a wavelength value out of phase.

25
Q

Monochromatic light?

A

Same frequency and wavelength.

26
Q

Modal dispersion?

A

Light rays enter the fibre at different angles taking different paths, and so take different times to reach the end of the optical fibre.

27
Q

Material dispersion?

A

Light consists of different wavelengths that travel at different speeds. This causes some light wavelengths to reach the end of the fibre faster.

28
Q

1 joule?

A

Energy equal to the energy needed to raise a 1N weight through a height of 1 metre.

29
Q

Electric current?

A

Rate of flow of charge.

30
Q

Potential difference?

A

Work done per unit charge.

31
Q

One coulomb?

A

Amount of charge that passes in 1 second if the current is 1 amp.

32
Q

Ohmic conductor?

A

Current is directly proportional to the potential difference.

33
Q

Thermistor?

A

A resistor with a resistance that depends on temperature.

34
Q

Hooke’s law?

A

Extension is proportional to applied force.

35
Q

Plastic deformation?

A

Material is permanently stretched.

36
Q

Young modulus?

A

A measure of the stiffness of a material.

37
Q

Power?

A

Rate of energy transfer.

38
Q

Internal resistance?

A

When chemical energy in a battery causes electrons to move and collide with one another.

39
Q

EMF?

A

Amount of electrical energy the battery produces for each coulomb of charge.

40
Q

Proton number?

A

Total number of protons in the nucleus.

41
Q

Nucleon number?

A

Total number of protons and neutrons.

42
Q

Isotopes?

A

Atoms with the same number of protons but different number of neutrons.

43
Q

Specific charge?

A

Charge to mass ratio.

44
Q

Nuclear force?

A

The force that overcomes the electrostatic repulsion between protons in the nucleus to keep the protons and neutrons together.

45
Q

Hypothesis?

A

An untested theory or idea.

46
Q

Photon?

A

Pack of electromagnetic waves.

47
Q

Scalar quantity?

A

Physical quantity which has magnitude only, no direction.

48
Q

Vector quantity?

A

Physical quantity which has magnitude and direction.

49
Q

Hadron?

A

Particles which feel the strong interaction.

50
Q

Uniform circular motion?

A

When an object rotates at a steady or constant rate.

51
Q

Centripetal force?

A

Resultant inward force towards the centre of the circle.

52
Q

SHM?

A

Acceleration of an object is directly proportional to its displacement from its equilibrium position in the opposite direction, and is directed towards the equilibrium.

53
Q

Free vibrations?

A

Involve no transfer of energy to or from the surrounding.

54
Q

Forced vibrations?

A

When there is no external driving forces.

55
Q

Natural frequency?

A

Frequency at which free oscillating systems oscillate at.

56
Q

Resonance?

A

When an oscillating system is forced to vibrate at a frequency close to its natural frequency. The amplitude of vibration increases rapidly to a maximum.

A2 Physics (25 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions