Electricity (Thinking Questions)

Which of the following materials is used in a light bulb to produce heat and light?

• Nichrome

• Copper

• Tungsten

• Steel

A higher resistance in a circuit causes a _________.

• smaller current

• higher voltage

• larger current

• lower voltage

Study the circuit diagram.

Which bulb, if faulty, would allow only one other bulb to light up in the circuit.

• W

• X

• Y

• Z

The diagram below shows five lamps connected to two batteries.

When one of the lamps is not working, only two light bulbs remain lighted.

Which lamp is NOT working?

• A

• B

• C

• D

Study the circuit below.

Which of the bulbs, B and C, will remain lit when bulb A blows?

• B only

• C only

• B and C

• None

Study the four circuits A, B, C and D shown below.

The bulbs and the batteries in the four circuits are identical. All the bulbs are lit up.

Which one of the following statements about the brightness of the bulbs is correct?

• The bulb in circuit A is as bright as the bulb in circuit C.

• The bulb in circuit A is as bright as each bulb in circuit D.

• Each bulb in circuit B is brighter than the bulb in circuit C.

• Each bulb in circuit B is brighter than each bulb in circuit D.