Brainscape's Knowledge GenomeTM

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


See full index

Physics IGCSE > 4.2 Electrical Quantities > Flashcards

4.2 Electrical Quantities Flashcards

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

unit of measuring charge

A

coulombs (C)

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

what is an electric field

A

the region in which another charge will experience a force

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

direction of electrical field lines

A

positive charges- away

negative charges- towards

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

conductor

A

material that allows charge to flow through it

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

insulator

A

material that does not allow charge to flow through it

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

electric current

A

flow of charge- can happen between two oppositely charged conductors connected by a wire

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

current in terms of charge

A

charge per second

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

formula for charge

A 
Q = I x t 
charge = current x time
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

unit of measuring current

A

ampes (A)

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

device for measuring current

A

Ammeter

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

cause of current

A

flow of electrons

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

direction of flow of electrons

A

negative to positive

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

direction of flow of current

A

positive to negative

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

electromotive force (EMF)

A 
Potential Difference (Voltage) of the
power source in a circuit
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

unit for measuring EMF

A

volts (V)

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

EMF in terms of energy

A

energy per coulomb (charge)

17
Q

potential difference

A

the amount of energy transferred by each unit of charge passing between those two points

18
Q

unit for measuring potential difference

A

Volts (V)

19
Q

relationship between energy and potential difference

A

1 Volt = 1 joule per coulomb

20
Q

device for measuring potential difference

A

Voltmeter (in parallel)

21
Q

resistance

A

opposition to current

22
Q

measuring unit of resistance

A

ohm (the sign that looks like a horse shoe)

23
Q

formula for resistance

A

potential difference/current

24
Q

to increase resistance

A

longer wire

25
Q

to decrease resistance

A

thicker wire (higher cross-sectional area)

26
Q

wire resistance and length relationship

A

directly proportional

27
Q

wire resistance and cross-sectional area relasionship

A

inversely proportional

28
Q

current and potential difference relationship

A

directly proportional

29
Q

factors effecting the amount of electrical energy used by a component

A

1- the current
2- the potential difference
3- amount of time the device is used for

30
Q

formula for energy transferred

A

E = I x V x t

= current x potential difference x time

31
Q

unit for energy

A

joules (J)

32
Q

electric power

A

energy per second

33
Q

formula for electric power

A 
P = current x potential difference
P = I x V
34
Q

unit for power

A

watt (W) or joules per second (J/s)

Physics IGCSE (7 decks)

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