The heating element of an electric iron is made up of:

• copper

• nichrome

• aluminium

• iron

The electrical resistance of insulators is

• High

• Low

• Zero

• Infinitely high

An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?

• 440 W

• 110 W

• 55 W

• 0.0023 W

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In the circuits shown, all resistors are identical

Which circuit has the least resistance?

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• A

• B

• C

• D

State the name of the logic gate A and B

• NOT and AND

• AND and OR

• NOR and NAND

• NOT and NOT

• A

• B

• C

• D

A student sets up four circuits containing diodes.

Which of the circuits will produce a rectified current through the bulb?

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What would be the reading on the voltmeter?

• 2 V

• 6 V

• 4 V

• 8 V