Electricity

Question 1

Total energy in =

Answer 1

Total energy out

Question 2

What does electric potential measure?

Answer 2

The amount of energy per unit charge (eg bread per van)

Question 3

What is electric potential measured in?

Answer 3

Volts

Question 4

What is 1V equivalent to?

Answer 4

1 joule a coulomb

Question 5

What does potential difference measure?

Answer 5

The difference between the amount of energy transferred per unit charge.

Question 6

What is potential difference measured in?

Answer 6

Volts

Question 7

A p.d of one volt is equivalent to,..

Answer 7

One coulomb of charge gaining or losing 1 joule of energy

Question 8

When the length of the wire increases…

Answer 8

The resistance increases

The current decreases

Question 9

What is charge measured in?

Answer 9

Coulombs

Question 10

What does current measure?

Answer 10

The rate of the flow of charge

Question 11

What is current measured in?

Answer 11

Amperes

Question 12

What do you measure current with?

Answer 12

An ammeter

Question 13

What do you measure electric potential with?

Answer 13

Voltmeter

Question 14

What is one amp equivalent to?

Answer 14

One coulomb of charge passing through a point each second

Question 15

Does current get used up?

Answer 15

No

Question 16

Does charge get used up?

Answer 16

No

Question 17

Does energy get used up?

Answer 17

Yes

Question 18

When two insulators such as a Perspex and a duster a rubbed together what is transferred between them?

Answer 18

Electrons

Question 19

If an object has an excess of electrons, what kind of charge will it have?

Answer 19

Negative

Question 20

What piece of equipment can be used to measure the current in an electric circuit?

Answer 20

Ammeter

Question 21

If I increase the number of cells in a battery, what will happen to the potential difference in a circuit?

Answer 21

Increases

Question 22

If two similarly charged objects are brought together, what will happen to them?

Answer 22

Repels

Question 23

When I add a second bulb into a circuit in series the brightness of both bulbs will decrease. One reason for this is that the energy carried by each charge is shared between two bulbs, what is the other reason?

Answer 23

Current decreases

Question 24

When I touch the Van de Graaf generator my hair stands on end, what does this tell us about the hair?

Answer 24

All hairs have the same charge

Question 25

A material that easily allows electric charge to flow through it is known as what?

Answer 25

Conductor

Question 26

If I have two identical bulbs in parallel, if the potential difference across 1 bulb is 6V, what is the potential difference across the other bulb?

Answer 26

6V

Question 27

I have a 10 ohm resistor in series with a 20 ohm resistor. The current through the 10 ohm resistor is 2A, what is the current through the 20ohm resistor?

Answer 27

2A

Question 28

What equipment would I need in order to determine the resistance of a component in a circuit?

Answer 28

Voltmeter and Ammeter

Question 29

If I have 3 batteries in series, each with a value of 1.5V, what will my potential difference be if I reverse the direction of one of the batteries?

Answer 29

1.5V

Question 30

In the bakery model, what do the vans represent?

Answer 30

Charges (1 van = 1 coulomb of charge)