N(T)-Level Science, Electricity and Magnetism module quiz (SEAB 5148) quiz

A complete loop with a source of energy

A break somewhere in the wire

Only a bulb on its own

Two switches both turned off

A voltmeter, connected across a component

An ammeter, connected in series

A thermometer, connected in parallel

A balance, connected in series

It stays exactly as bright

It gets brighter

It goes out because the circuit is broken

It changes colour

So all lights must be on at once

Because parallel needs only one wire

Because parallel uses no electricity

So each light works on its own and can be switched separately

The volt

The ampere

The ohm

The watt

Voltage = current times resistance

Voltage = current divided by resistance

Voltage = resistance divided by current

Voltage = current plus resistance

7 V

12 V

1.3 V

0.75 V

8 ohms

12 ohms

3 ohms

4 ohms

It increases the current

It stores the extra current

It cools the wires down

It melts and breaks the circuit

So fault current flows safely to earth instead of through a person

To make the appliance heavier

To increase the voltage

To save electricity

Plastic is a good conductor

Plastic is an insulator and stops you touching live wires

Plastic increases the current

Plastic makes the wire magnetic

North and north

South and south

North and south

Any two like poles

Copper

Glass

Plastic

Iron

Wind a coil of wire around an iron core and pass a current through it

Rub a plastic rod with a cloth

Heat a copper wire until it glows

Connect two bulbs in series

It is always magnetic and can never be turned off

It can be switched on to pick up steel and off to drop it

It works only on plastic

It needs no electricity