Brainscape's Knowledge GenomeTM

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


See full index

PHYSICS A LEVEL REVISION - LVI > Headstart > Flashcards

Headstart Flashcards

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

What is the equation for velocity, using displacement and time

A

V =s/t

V - ms^-1
S - m
t - s

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

What is the equation for acceleration using velocity and time?

A

a = (v-u)/t

a - ms^-2
v - ms^-1
u - ms^-1
t - s

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

What is the value of acceleration due to gravity?

A

-9.81 ms^-1

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

How to find the velocity form a displacement-time graph?

A

Velocity = gradient = change in displacement/change in time

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

What is Newton’s second law?

A

F = m x a

F - N
m - kg
a - ms^-2

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

What is the equation for kinetic energy

A

E(k) = 0.5 x m x v^2

E(k) - J
m - kg
v - ms^-1

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

What is the equation for gravitational potential?

A

E(p) = m x g x h

E(p) - J
m - kg
g - 9.81
h - m

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

What is the principle of energy?

A

Energy cannot be created or destroyed- it can only be converted into other forms

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

What is the equation for work done involving force and distance?

A

W = F x s

W - J
F - N
s - m

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

What does work done mean in regards to GPE and KE?

A

Work done = increase in GPE and KE

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

What is power?

A

Power is the work done per unit time

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

What is the equation for power using work done?

A

P = W/t

P - W
W - J
t - s

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

What is the equation for power using force?

A

P = F x v

P - W
F - N
v - ms^-

Note: ONLY true when object is moving at constant speed in same direction as the force

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

What is Hooke’s Law?

A

F = k x difference in l

F - N
k - Nm^-1
l - m

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

What is the limit of proportionality?

A

The maximum force that can be applied to a spring and it will still extend proportionally

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

What is the equation for electric current?

A

I = Q/t

I - A
Q - C
t - s

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

What is the equation for potential difference across components?

A

V = W / Q

V - V
W - J
Q - C

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

What is Kirchhoff’s First Law?

A

The sum of the currents going into the junction = the sum of the currents going out —> current is same everywhere in series circuit, shared in parallel circuit

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

What is Kirchhoff’s 2nd Law?

A

For any closed loop in a circuit, the sum of the potential differences across the components equals the potential difference of the power supply

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

What is the equation for resistance?

A

R = V/I

R - ohms
V - V
I - A

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

What is Ohms Law

A

Potential difference is proportional to Current when temperature is constant. (Eg of ohmic component - resistor

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

What does a Current-Pd (I-V) graph look like for an ohmic component?

A

Straight line, with gradient equal to 1/resistance of component, goes through origin

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

What does a current-pd (I-V) graph look like for a non-ohmic component look like?

A

1) filament lamp - as pd across lamp increases, filament gets hotter, resistance increases
2) diode - only let current flow one way, resistance is very high in other direction

24
Q

What is power?

A

Power is the rate of transfer of energy

25
Q

What is the equation of finding power from current and pd

A

P = V x I

P - W
V - V
I - A

26
Q

What is the equation for power using current and resistance

A

P = V^2/R

P - W
V - V
R - ohms

27
Q

Define transverse waves

A

Transverse waves vibrate at 90° to direction of travel

28
Q

Define longitudinal wave

A

Vibrate parallel to direction of travel

29
Q

Define displacement

A

How far a point on the wave has moved from its equilibrium position

30
Q

Define amplitude

A

The largest possible displacement from the equilibrium position

31
Q

Define wavelength

A

The length of one wave cycle

32
Q

Define period

A

The time taken for a while cycle to complete or pass a certain point

33
Q

What is the equation for frequency

A

f = 1/T

f - Hz
T - s

34
Q

What is the wave equation for speed, frequency and wavelength

A

v = f x wavelength

v - ms^-1
f - Hz
Wavelength - m

35
Q

What is the angle of incidence

A

The angle of the incoming wave

36
Q

What is the angle of reflection

A

The angle of the reflected wave

37
Q

What is the law of reflection?

A

Angle of incidence (i) = angle of reflection (r) I

38
Q

What happens when an EM wave enters a denser medium?

A

It bends towards the normal

39
Q

What happens when an EM enters a less dense medium

A

It bends away from the normal

40
Q

What is Snell’s Law?

A

When an incident ray travelling in air meets a boundary with another material, the angle of refraction of the ray, r, depends on the refractive index of the material and the angle of incidence, i.

Refractive index (n) = sin i/ sin r

41
Q

What is the unit for EMF?

A

Volt, V

42
Q

Give an example of a transverse wave

A

Electromagnetic waves

43
Q

Give an example of a longitudinal wave

A

Sound waves

44
Q

What is the relative mass of a proton?

A

1

45
Q

What is the relative mass of a neutron

A

1

46
Q

What is the relative mass of an electron

A

0.0005

47
Q

What is the nucleon number?

A

Aka the mass number, total number of protons and neutrons

48
Q

What is the proton number?

A

Aka the atomic number, total number of protons in an atom

49
Q

What are isotopes?

A

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

50
Q

What happens in alpha decay?

A

An alpha particle is emitted from the nucleus (made up of two protons and two neutrons)

Proton number goes down by two, nucleon number down by 4

51
Q

What is beta decay?

A

A neutron in the nucleus turns into a protein and an electron. Electron is emitted from particle

Proton number goes up by 1, nucleon number doesn’t change

52
Q

What is gamma decay?

A

High- energy electromagnetic radiation (gamma radiation) is emitted from nucleus

Number of protons and neutrons stay the same

53
Q

What is the independent variable?

A

The thing you change in an experiment

54
Q

What is the dependant variable?

A

The thing you are measuring in an experiment

55
Q

What is a control variable?

A

Variables that must be kept the same to ensure it is a fair testament

56
Q

What is a positive correlation

A

As one variable increases, the other increases

57
Q

What is negative correlation

A

As one variable increases, the other decreases

PHYSICS A LEVEL REVISION - LVI (9 decks)

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