Unit 6 Check your progress

A device for closing or opening a circuit.

• Battery

• Switch

• Lamp Holder

A device in a circuit for holding a lamp in place.

• Bulb

• Wire

• Lamp Holder

Something that pushes electricity around a circuit.

• Cell

• Wire

• Lamp Holder

Which of the following materials are insulators of electricity?

• gold

• cork

• plastic

• aluminium

In the circuit alongside: What does the component A do?

• It closes or opens the circuit.

• Provides power to the circuit.

• Stores electrical energy.

In the circuit alongside: What must you do to this circuit to turn the lamp off?

• Add another lamp.

• Open the switch.

• Disconnect a wire.

• Remove the battery.

In the circuit alongside: If you added a second lamp to the circuit, would the lamps glow more brightly or more dimly?

• More brightly.

• The same brightness.

• More dimly.

• Not at all.

In the circuit alongside: If you added another 1.5 V cell to the circuit, would the lamps glow more brightly or more dimly?

• More dimly.

• The same brightness.

• Turn off completely.

• More brightly.

Arun's mother asked him to fix the iron because it was not working.

Arun got an electric shock!

What had Arun forgotten to do?

• Wear gloves.

• Switch off the electricity.

• Use the correct tools.

• Unplug the iron.

Here are four steps, that you should take to replace a light lamp safely with a new one.

The steps are in the wrong order. Re-arrange the steps so that they are in the correct order.

• Screw in the new light lamp.

• Unscrew the old light lamp.

• Switch the electricity off.

• Wait for the lamp to cool down.