Brainscape's Knowledge GenomeTM

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


See full index

Physics > Summer Exams > Flashcards

Summer Exams Flashcards

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

Charge=

A

Current X time

Q=IT

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

Voltage=

A

Current x resistance

V=IR

(Ohms law)

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

Electrical power=

A

Current x voltage

P=IV

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

Electrical power 2=

A

V=IR

P=I(squared)R

P=V(squared)/R

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

dfElectrical energy=

A

Current x voltage x time

E=IVT

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

Weight=

A

Mass x gravity

W=mg

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

Force=

A

Mass x acceleration

F=ma

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

Work done=

A

Force x distance

W=fd

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

Power=

A

Rate of doing work

P= W/t

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

Kinetic energy=

A

1/2mass x (speed) squared

1/2m(v)squared

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

Gravitational potential energy=

A

Mass x gravity x height gained

Gpe=mgh

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

Force=

..

A

F=kx

Force = spring constant x extension

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

Refractive index=

A

Sine angle of incidence/ since angle of refraction

N= sin i/ sin r

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

Sine (critical angle)

A

Sin c = 1/n

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

Pressure=

A

F/A

Force/area

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

Boyles law=

A

P1V1= P2V2

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

Series circuit

A

Simple circuit

When the different components are connected in a line

Can’t control which components current flows through

If u remove a component or it breaks then the whole thing stops working

E.g. Fairy lights

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

Parallel circuit

A

One on top of the other

If u remove or disconnect one of them, it will hardly effect the others

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

Ammeter rules

A

Ammeters are always connected in series, even in a parallel circuit

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

Voltmeter rules

A

Voltmeters are always connected in parallel with a component, even in a series circuit

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

Series components

A

Current same, voltage shared, add resistance to get total resistance

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

Parallel components

A

Voltage same, current shared in branches of circuit

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

Ohms law

A

V=IR

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

Newton’s second law force

A

f=ma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

work also equals

A

change in energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Conversion of energy in falling objects

A

GPE at start = KE at end
GPE will equal 0 and
KE will equal what the original GPE was

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The earth wire

A

the earth wire is connected to the outer metal case of an appliance. if the live wire inside the appliance become s detached and touches the outer metal case, the outer metal case becomes live and hazardous to the user. The current rapidly flows around the metal case, to the earth wire and down to earth. once this happens, the appliance is no longer hazardous to the user because it is no longer connected to the live supply . Without the earth wire it could kill you.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Double insultation

A

Articles with plastic outer cases are referred to as being doubly insulated because they have the insulation of the electric cable and the the insulation of the plastic case to protect the user. For this reason it doesn’t need an earth wire. Diagram looks like a square inside a square.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Neutral wire

A

blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

live wire

A

brown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

earth wire colour

A

yellow and green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Fuse

A

a fuse is a short piece of thin wire, which gets hot as current flows through it, if the wire gets too hot then the fuse melts, which breaks the circuit and switches off the current.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Circuit breakers

A

Modern consumer units have a main switch which will switch off all the circuits in the house in a very short time if an earth leakage current of more than about 25mA occurs. It detects when the current through two wires is different and breaks the circuit, which makes sure no people are harmed from the flow.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Circuit breakers V Fuses

A

Circuit breakers are easily re set, with the flick of a switch and there is no melted fuse wire to replace. The most important point is that circuit breakers can break an overloaded circuit much faster than a fuse can.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

the most common defects likely to cause short-citcuting are:

A
  • damaged plug, damaged insulation or frayed cabels
  • overheating cabels
  • damp conditions
  • loosely connected wires
  • long cables
  • pushing metal objects into sockets
36
Q

The earth wire and the fuse together protect

A

the appliance and the user

37
Q

Resultant forces

A

whenever two bodies interact the forces they exert on each other are equal and opposite.

a number of forces acting on a body may be replaced by a single force, which has the same effect on the body as the original forces all acting together. This force is called the resultant force or unbalanced area.

38
Q

Resultant forces questions eq

A

acceleration= unbalance force/ mass

39
Q

unbalanced force=

A

either big arrow minus small arrow
or
if they are both travelling in the same direction then add the arrows

40
Q

What factors affect the stopping distance of a car?

A

factors affecting thinking distance e.g. drugs and drinking

factos affecting braking distance e.g. road conditions and condition of car

41
Q

Friction

A

friction is the force responsible for keeping nails and screws in different surfaces such as wood or walls

the direction of frictional forces is always opposite to the direction in which the object or surface is moving

friction causes objects to heat up and to wear away at any surfaces

42
Q

friction acts when

A

an object moves through fluids such as air or water when solid surfaces slide across each other

43
Q

air resistance

A

a friction force known as drag

opposed the motion of objects through air

44
Q

water resistance

A

a friction force known as drag

opposes the motion of objects through water

45
Q

Steps of a ball falling

A

it initially accelerated due to the force of gravity (which is called weight as it acts downwards)

as the object falls, it collides with fluid particles which exert upward frictional forces on the object

as the speed of the object increases, it collides with more particles per unit time

frictional forces increase in this way until they balance the gravitational forces

the resultant force eventually reaches zero and the body no longer accelerates

the body continues to fall at a constant speed, called the terminal speed.

46
Q

Diagram of ball falling

A

6 balls
first one with just a downward arrow
the top arrow slowly grows on each diagram as the speed is increasing until the last one when both arrows are equal

47
Q

Parachute graph start

A

parachutist leaves plane. The resultant force acting on the parachutist is the weight of the parachutist, which remains constant and acts towards the centre of the earth. the parachutist accelerates towards the earth at 9.8m/s2

48
Q

Parachute graph middle of start and plateau

A

the drag force is increasing and the acceleration of the parachutist is less than 9.8m/s

49
Q

Parachute graph plateau start

A

the drag force is equal to the weight of the parachutist. the resultant force acting on the parachutist is zero and the acceleration acting on the parachutist is also zero. the parachutist travels towards the earth at a constant velocity

50
Q

Parachute graph plateau end before drop

A

the parachute is deployed and the drag force increases to a value that is greater than the weight of the parachutist. The resultant force acts upward and the parachutist experiences deceleration .

51
Q

as the parachutist slows the drag force

A

decreases

52
Q

parachute graph at the bottom of the drop

A

the drag force equals the weight of the parachutist and as the resultant force is zero, the parachutist travels at a constant velocity

53
Q

parachute graph at the end of the plateu after the drop (the end)

A

the parachutist reaches the surface of the earth

54
Q

Air- glass

i

A

refracts away from the normal

55
Q

Air-glass

i=c

A

refraction takes place along the interface (angle of refraction =90)

56
Q

air-glass

i>c

A

total internal reflection

57
Q

when drawing angles…

A

remember to draw arrows in the direction that it is going

normal: 90 degrees to surface, get your ruler and put the line under the number on top of the line that the ray passes through, draw a horizontal line through it.

58
Q

air-glass

A

opposites

draw the two on opposite sides of the shape then join up the normals in a slight slope in the middle

59
Q

angle of incidence=

A

angle between the normal and the incident ray

one going in

60
Q

angle of refraction=

A

the angle between the normal and the refracted ray

one that is coming out

61
Q

law of reflection

A

angle of incidence=angle of reflection

62
Q

c=

glass

A

42

63
Q

c=

water

A

49

64
Q

total internal reflection only happens when

A

ray travels from more dense to less dense

65
Q

glass=

A

more dense

66
Q

air=

A

less dense

67
Q

total internal reflection is used for

A

endoscopes

optical fibers

68
Q

Boyle’s law explination

A

for a fixed mass of an ideal gas at a constant temperature, if the volume of the gas is decreased, the pressure exerted by the gas will increase. The product of the pressure of the gas and the volume of the gas is a constant. e.g.= pV=constant

69
Q

for a fixed mass of a gas at constant temperature

A

P1V1=P2V2

70
Q

Pressure is measured in

A

Pa
or
N/m2

71
Q

p=

A

f/a

72
Q

Pressure in a gas

A

when particles collide with walls of containers, each collision exerts a force and pressure is therefore released on the walls of the container

the average kinetic energy of the particles in a substance is directly proportional to the kelvin temperature of the substance

if the gas is confined to a container and heated, then the molecules will possess a greater average kinetic energy

as a result their speed will increase more and the gas molecules will collide more often with the walls of the container, exert a greater force on the walls during each collision

73
Q

pressure acts in

A

all directions

74
Q

examples of pressure

A

breathing

aerosoles

75
Q

Kelvin scale of temperature

A

t(k)=t(degrees c) +273
t(degrees c)= t(k)-273

0k=-273

76
Q

energy of gas particles at absolute zero is

A

zero

77
Q

kelvin temperature

A

is directly proportional to the mean (average) kinetic energy of gas particles

78
Q

the kinetic theory of matter

A

based upon the following statements

1) all matter is made up of tiny particles called molecules
2) the molecules are in constant state of rapid, random motion
3) the higher the temp the more energy the molecules possess so the faster they move

79
Q

evidence of kinetic theory of matter 1

A

1) diffusion: when one substance gradually spreads through another substance, it is diffusing through it. Examples include the diffusion of perfume throughout a room, if the top is left off the perfume bottle or the mixing with a drop of coloured dye placed in a glass of water

80
Q

evidence of kinetic theory of matter 2

A

2) bownian motion: if a cell of air containing some smoke is illuminated and viewed under a microscope, the smoke particles can be seen moving about randomly in all directions in a jerky motion

81
Q

hi charlotte

A

REVISSSSEE

82
Q

how much electrical energy an appliance transfers relies on

A

how long the appliance is switched on

how fast the appliance transfers energy

83
Q

whenever two bodies interact the factors they exert on each other are

A

equal and opposite

84
Q

hookes law

A

provided the stretching force acting on an object does not extend the object beyond the elastic limit, the extension of the object is directly proportional to the stretching force

85
Q

k

A

spring constant

Physics (6 decks)

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