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1How can a plastic ruler be given How can a plastic ruler be given an electric charge?an electric charge?

answer

•By rubbing it. •This causes charges to build up on the ruler.

Electrons – tiny negative particles in an atom

answer

2 Name a particle Name a particle responsible for charge?responsible for charge?

What happens to an What happens to an atom when it becomes atom when it becomes negatively charged? negatively charged?

It gains electrons

answer

3

What happens to an What happens to an atom when it becomes atom when it becomes

positively charged? positively charged?

It loses electrons

answer

4

What is build up of charge What is build up of charge on an object’s surface on an object’s surface

called? called?

Static electricity

answer

5

What is moving What is moving charge called? charge called?

currentanswer

6

Why are component Why are component symbols used in circuit symbols used in circuit

diagrams?diagrams?

Easier to draw and understand

answer

7

Name the parts of the Name the parts of the atomatomanswer

8

Electron

Nucleus (protons and neutrons)

Particle Name

Charge Location

Proton

Electron

Neutron

Complete the table?Complete the table?

Positive Nucleus

Negative Outside nucleus

Neutral Nucleus

answer

9

Electrical Symbol

Name of electrical component10

answer

Cell

Battery

Ammeter

Variable resistor

Bulb

Lead

Voltmeter

Switch

Label the positive and Label the positive and negative ends of the negative ends of the

cell.cell.

+ - answer

11

Draw a series circuit Draw a series circuit diagram for a torchdiagram for a torch

answer

12

Draw an arrow to show Draw an arrow to show the direction of the the direction of the

current for each cell.current for each cell.answer

13

A B

+ -

- +

Negative to positive

answer14 Match the answer to the circuit.

Bright Off Dim Very Bright

Bright Very Bright (two cells)

Dull (two bulbs) Off (cells wrong way round)

Amps (A)Ammeter

answer

15 What is the unit of electric current?

What is used to measure it?

What happens to a wire What happens to a wire when a large current when a large current

flows though it?flows though it?

It heats up due to resistance

answer

16

Volts (V)

Voltmeter

answer

17 What is the unit of voltage?What is used to measure it?

Name an appliance Name an appliance that uses resistance that uses resistance

to produce heat.to produce heat.

Oven, kettle, straighteners etc...

answer

18

Name an Name an appliance that appliance that uses variable uses variable resistance.resistance.

•Dimmer switch on a light

•Volume control

answer

19

Name the safety Name the safety device inside a device inside a

plug. plug. How does it work?How does it work?

FuseIt melts when too large a current flows

answer

20

Label the plugLabel the plug

answer

21

Earth

NeutralLive

fuse

cable

Cable grip

What is VOLTAGE?What is VOLTAGE?

The energy supplied by the cell

to the charges in the circuit

answer

22

Where should the Where should the ammeter be ammeter be

placed?placed?answer

23

A In series

Where should the Where should the voltmeter be placed?voltmeter be placed?

answer

24

V

Across the component

What is the voltage What is the voltage across the bulbs?across the bulbs?

answer

25

Series CircuitVoltage of cell =

Voltage of all components added together

What is the voltage What is the voltage across the bulbs?across the bulbs? answer

26

Parallel CircuitVoltage of cell =

Voltage of each component

V

V

3VV

3V

3V

What is the current What is the current measured at each measured at each

ammeter?ammeter?

27

Parallel CircuitCurrent at cell =

Current of each branch added together

2A

2A

1A

1A

A

A

A

A answer

What is the current at What is the current at each bulb?each bulb?

answer

28

2.5ACurrent has the same value at all points in a series circuit.