Electrical Concepts Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What are the two kinds of charge?

A

Positive and negative

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

Are materials with different (opposite) charges attracted or repelled by each other?

A

Attracted

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

Are materials with the same charge repelled or attracted to each other?

A

Repelled

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

What is an electric field?

A

A region of space where charge experiences an electrical force

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

What is the unit of charge?

A

Coulomb

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

What direction does a positive charge face?

A

The direction of an electric field

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

What’s direction does a negative charge face?

A

The opposite direction of the field

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

What is a conductor?

A

A material in which charge carriers can move

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

What are the charge carriers that are usually in solids?

A

Electrons

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

What are some good conductors?

A

Iron, copper, brass, aluminium and graphite (carbon)

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

What are liquid conductors?

A

Usually positive and negative ions of dissolved materials

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

Is water a conductor? If yes, give an example how

A

Yes. This is why it’s dangerous to when water comes into contact with mains electricity

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

What is an insulator? Give examples

A

A material in which charge carriers cannot move. Such as glass, polythene and rubber

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

Can charge flow when there is no complete path of conductors or a source of electrical energy?

A

No

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

What is a complete path of conductors called?

A

An electrical circuit

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

What happens when a supply is switched on?

A

It applies an electrical field to the conductors in a circuit

17
Q

What does the electrical force cause?

A

It causes charge carriers to flow

18
Q

What is a flow of charge called in a conductor?

A

A current

19
Q

What is the SI unit of current?

A

Ampere (A)

20
Q

What is the symbol for current used in SQA

A

I

21
Q

What is the relationship between charge, current and time?

A

Q=It

22
Q

If an electrical torch is switch on for 30 minutes. The current in the bulb of the torch is 0.45A. Then calculate the charge that flows through the bulb

A

I= 0.45A
t= 30 minutes= 1800s
Q=It
=0.45 X 1800
=810C

23
Q

What is used when an electrical force causes charge to move? And what is done?

A

Electrical energy is used and work is done