Brainscape's Knowledge GenomeTM

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


See full index

A2 Physics > Paper 2 Definitions > Flashcards

Paper 2 Definitions Flashcards

1
Q

Electric potential?

A

Work done in bringing a positive charge from infinity to a distance r away from a charge Q.

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

Electric potential difference?

A

Difference in electrical potential between two points in an electric field.

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

Coulombs law?

A

Force between two charges is proportional to the product of the charges.

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

Electric field strength?

A

Force per unit charge acting on a small positive test charge at that point.

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

Capacitance?

A

Charge required to cause unit potential difference in a conductor.

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

Permittivity?

A

A measure of how difficult it is to generate an electric field in a medium.

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

Dielectric?

A

A material whose molecules polarise inside an electric field.

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

Magnetic flux density?

A

Force on one metre of wire carrying a current of 1 amp at right angles to the magnetic field.

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

Magnetic flux density?

A

Strength of the magnetic field or the number of field lines per unit area.

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

Induced emf?

A

Rate of change of flux linkage.

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

Faraday’s law?

A

Induced emf is directly proportional to the rate of change of flux linkage.

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

Lenz’s law?

A

The induced emf is always in such a direction as to oppose the change that caused it.

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

AC?

A

One that changes direction with time.

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

Transformers?

A

Devices that make use of electromagnetic induction to change the size of the voltage for alternating current.

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

Eddy currents?

A

Looping current induced by the changing magnetic flux, resulting in the reduction of the value of the induced emf in the secondary coil.

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

Field?

A

A region where a body will experience a non-contact force.

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

Gravitational fields?

A

A region of space which any mass will experience a force of attraction.

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

Gravitational field strength?

A

Force per unit mass on a small test mass placed in the field.

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

Gravitational potential?

A

The GPE that a unit mass at that point would have.

20
Q

Equipotentials?

A

Lines which connect points of the same gravitational potential.

21
Q

Escape velocity?

A

Minimum velocity required for an object to escape from the planet when fired vertically from the surface.

22
Q

Synchronous orbit?

A

When an orbiting object has an orbital period equal to the rotational period of the object it is orbiting.

23
Q

Internal energy of a body?

A

Sum of the randomly distributed kinetic and potential energies of all its particles.

24
Q

Specific heat capacity of a substance?

A

Amount of energy needed to raise the temperature of 1kg of the substance by 1K.

25
Q

Latent heat?

A

Energy needed to break the bonds that hold the particles in place.

26
Q

Specific latent heat of fusion or vaporisation?

A

Quantity of thermal energy needed to be gained or lost to change the state of 1kg of a substance.

27
Q

Boyle’s law?

A

At a constant temperature the pressure p and volume V of a gas are inversely proportional.

28
Q

Charle’s law?

A

At constant pressure, the volume V of a gas is directly proportional to its absolute temperature, T.

29
Q

Pressure law?

A

At constant volume, the pressure p of an ideal gas is directly proportional to its absolute temperature T.

30
Q

Molecular mass?

A

Sum of all the masses of all the atoms that make up a single molecule.

31
Q

Avogadro’s constant?

A

Number of atoms in 12g of carbon 12.

32
Q

Molar mass?

A

Mass that 1 mole of a substance would have.

33
Q

Alpha?

A

2p, 2n, helium nucleus.

34
Q

Beta minus?

A

Fast moving electron.

35
Q

Beta plus?

A

Fast moving positron.

36
Q

Gamma?

A

High energy, high frequency, short wavelength wave.

37
Q

Intensity of radiation?

A

Amount of radiation per unit area.

38
Q

Activity?

A

Number of nuclei that decay each second.

39
Q

Decay constant?

A

Probability of a specific nucleus decaying per unit time, and is a measure of how quickly an isotope will decay.

40
Q

Half life?

A

Average time it takes for the number of unstable nuclei to halve.

41
Q

Binding energy?

A

Energy needed to separate the nucleons in a nucleus.

42
Q

Nuclear fission?

A

When large unstable nuclei are split into smaller daughter nuclei.

43
Q

Nuclear fusion?

A

When two light nuclei combine to create a larger nucleus.

44
Q

Moderator?

A

Slows down the neutrons so that they can be absorbed by the uranium nuclei.

45
Q

Critical mass?

A

Amount of fuel needed to continue the rate of fission reaction at a steady rate.b

A2 Physics (25 decks)

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