KS3 - Ks3 Science - Electrical Circuits 02 Solution - MCQGeeks.com

Q.1.

If the size of a battery in a complete circuit is increased:

0%
the current decreases
100%
the current increases
0%
the current stays the same
0%
the voltage stays the same

Q.2.

Wires are normally made from copper. This is because:

0%
copper has a high resistance
100%
copper is a very good conductor of electricity
0%
copper is cheap
0%
copper is expensive

Q.3.

Wires are usually coated in plastic because:

0%
plastic can be lots of different colours
0%
plastic helps the wires bend
0%
plastic helps the wires conduct electricity
100%
plastic is an insulator

Q.4.

Two bulbs are in series in a complete circuit. If the voltage is increased:

0%
the bulbs get brighter and the current decreases
100%
the bulbs get brighter and the current increases
0%
the bulbs get dimmer and the current decreases
0%
the bulbs get dimmer and the current increases

Q.5.

Two identical bulbs are in parallel in a complete circuit. If one breaks:

0%
the other bulb is brighter
100%
the other bulb is dimmer
0%
the other goes off
0%
the other stays on

Q.6.

Three identical bulbs are in parallel in a complete circuit. The current in each bulb:

100%
is different in all bulbs
0%
is greatest in the bulb nearest the battery
0%
is the same
0%
is three times the current flowing from the battery

Q.7.

Two identical bulbs are in parallel in a complete circuit. A third identical bulb is connected in parallel. What happens?

0%
All the bulbs are dimmer
100%
All the bulbs are the same brightness
0%
The third bulb is brighter
0%
The third bulb is dimmer

Q.8.

The current in a series circuit containing two bulbs:

0%
is larger between the bulbs
100%
is larger nearer the battery
0%
is smaller nearer the battery
0%
is the same at every place in the circuit