Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

physics gcse > Electricity > Flashcards

Electricity Flashcards

(70 cards)

Start Studying
1
Q

1 MW = how many W?

A

1, 000, 000 W

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

1 kW = how many W?

A

1, 000 W

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

what is the circuit symbol for a switch?

A

https://www.shutterstock.com/image-vector/open-closed-switch-symbol-260nw-2084069083.jpg

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

what is the circuit symbol for a lamp?

A

https://ichef.bbci.co.uk/images/ic/480x270/p0dzbrn3.png

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

what is the circuit symbol for a fuse?

A

https://upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Fuse_symbol_Europe.svg/320px-Fuse_symbol_Europe.svg.png

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

what is the circuit symbol for a cell?

A

https://ichef.bbci.co.uk/images/ic/480xn/p0dzbkgc.png

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

what is the circuit symbol for a voltmeter?

A

https://upload.wikimedia.org/wikipedia/commons/5/59/Voltmeter_symbol.png

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

what is the circuit symbol for a battery?

A

https://ichef.bbci.co.uk/images/ic/976xn/p0dzbbj0.png

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

what is the circuit symbol for a ammeter?

A

https://i.sstatic.net/sTYoJ.png

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

what is the circuit symbol for a diode?

A

https://keystagewiki.com/images/thumb/7/75/DiodeSymbol.png/300px-DiodeSymbol.png

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

what is the circuit symbol for a thermistor?

A

https://res.cloudinary.com/rspoc/image/upload/f_auto/q_auto/v1682074329/RS%20CONTENTFUL/Discovery/Other%20image%20assets/07_thermistors_Illustration_Guides_Assets.png

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

what is the circuit symbol for a resistor?

A

https://www.iso.org/obp/graphics/grs/4d93d14e-708c-4937-aa30-b3c41d47c048_200.png

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

what is the circuit symbol for a variable resistor?

A

https://keystagewiki.com/images/thumb/1/1d/VariableResistorSymbol.png/300px-VariableResistorSymbol.png

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

what is the circuit symbol for a LED?

A

https://keystagewiki.com/images/thumb/4/4f/LightEmittingDiodeSymbol.png/300px-LightEmittingDiodeSymbol.png

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

what is the circuit symbol for a LDR?

A

https://bam.files.bbci.co.uk/bam/live/content/zwn7ng8/small

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

what is the circuit symbol for a buzzer?

A

https://ichef.bbci.co.uk/images/ic/976xn/p0dz3rjj.png

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

what is the circuit symbol for a motor?

A

https://ichef.bbci.co.uk/images/ic/976xn/p0dz3s7v.png

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

define electricity

A

the flow of electric charge around a circuit carried by electrons

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

define current

A

rate of flow of charge around a circuit

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

what does an ammeter measure?

A

current

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

is an ammeter connected in series or parallel?

A

series

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

what does a voltmeter measure?

A

voltage or potential difference

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

is a voltmeter connected in series or parallel?

A

parallel

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

define potential difference

A

energy supplied to each part of charge by energy source - the source does not supply electrons, but starts them flowing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
is current in series equal the whole way round, or split?
equal the whole way round
26
is potential difference in series equal the whole way round, or split?
split
27
is current in parallel equal the whole way round, or split?
split
28
is potential difference in parallel equal the whole way round, or split?
equal the whole way round
29
when components are added in series, does the resistance increase or decrease?
increase - you add resistance of each component to find total resistance
30
when components are added in parallel, does the resistance increase or decrease?
decrease - total resistance is less than the smallest resistor
31
does mains electricity use direct or alternating current?
alternating
32
what is the frequency of mains electricity?
50Hz
33
what does 50 Hz mean?
current changes direction 50 times a second
34
what is the outer insulation of a 3-pin plug?
All three wires in the cable are bundled together and there is extra plastic insulation wrapped round them all for safety
35
what is the cable grip in 3-pin plug used for?
holds the cable tightly in place so that wires do not become loose
36
what is a fuse?
A glass or ceramic canister containing a thin wire that melts if the current gets too high
37
what are the 3 types of fuse and how do you decide which to use?
3A, 5A, 13A - a fuse is chosen just higher than working current
38
what are the wires in 3-pin plugs made of?
copper
39
what colour is the live wire in a 3-pin plug?
brown
40
where is the live wire in a 3-pin plug?
on the right
41
what does the live wire in a 3-pin plug do?
- connects appliance to mains - if this wire touches the outer casing of an object, the object will become live
42
what colour is the neutral wire in a 3-pin plug?
blue
43
where is the neutral wire in a 3-pin plug?
on the left
44
what does the neutral wire in a 3-pin plug do?
connects appliance to mains (electrons oscillate back and forth through live and neutral wire, transferring electrical energy)
45
what colour is the earth wire in a 3-pin plug?
yellow and green striped
46
where is the earth wire in a 3-pin plug?
in the centre
47
what does the earth wire in a 3-pin plug do?
provides a path for current to flow (very low resistance) from the case of the device to the ground if live wire touches casing
48
how does a circuit breaker work?
checks there is no difference in current in live and neutral wires - if there is, it stops the flow of electricity
49
why are circuit breakers used?
faster than a fuse
50
what is the national grid?
system of cables and transformers linking power cables to consumers
51
what are transformers used for?
used to change voltages and currents in transmission lines
52
what are transformers made of?
formed from two coils of wire around a magnetic core.
53
why are transformers used in the national grid?
- high current = high temperature = more energy loss - increasing voltage decreases current as power transferred will stay the same - changing current reduces energy losses in overhead wires
54
describe the process of gaining static electricity
- insulating materials rub against each other and the electrons move as they are on the outside - friction when rubbing materials causes electrons to gain energy - enough to leave the atom so the materials become electrically charged, as electrons rub off one material and onto the other - the material which gains electrons is negatively charged - the insulating materials prevent electrons from moving so charge remains static - conductors cannot hold charge as electrons can move through
55
what do the arrowheads on electric field diagrams show?
the way another positive charge would move
56
What does ‘direct potential difference’ mean?
the polarity of the supply does not change
57
what is electric charge measured in?
coulombs (C)
58
why is the current in series equal the whole way round?
the current is in a single, closed loop so it has nowhere else to go, so must be the same at all points
59
what is the resistance of a component?
the measure of how it resists the flow of charge
60
what does a higher resistance mean?
- the more difficult it is for charge to flow - the lower the current
61
what does a bigger potential difference across a component mean?
- the greater the flow of charge through the component - the bigger the current
62
what does a steep gradient on an I-V graph mean?
low resistance, as a large current will flow for a small potential difference
63
what does a shallow gradient on an I-V graph mean?
high resistance, as a large potential difference is needed to produce a small current
64
why is the total resistance in series circuits the sum of the resistance of each component?
the current has to travel through each component in turn
65
why is the total resistance in parallel circuits less than the resistance of the smallest resistor?
there are more paths for the current to take, allowing it to flow more easily
66
what does the power of a device depend on?
the p.d across it and the current flowing through it
67
what potential difference is mains electricity?
230V
68
why is using a small number of large power stations more efficient than using many small, local power stations?
large stations can be built to be made more efficient eg most power plants use steam turbines which are more efficient at higher steam temperatures and the bigger the plant, the bigger the boiler, so the higher the steam temperature
69
how do electrical sparks occur?
- as the charge on an isolated object increases, the p.d between the object and the earth increases - when the p.d become high enough, a spark may jump across the gap, from the object to any earthed conductor near it - the spark discharges the charged object and could be felt as an electric shock
70
what does the strength of an electric field at any point depend on?
- the distance from the object as the further away from the object, the weaker the field - the amount of charge, as the higher the charge, the stronger the field

physics gcse (13 decks)

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