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Electrical energy II - JSS3 Basic science Past Questions and Answers - page 1

1
What is the purpose of a fuse in an electrical circuit?
A

To increase the flow of electricity

B

To control the flow of water

C

To break the circuit if there's too much current flowing

D

To generate heat

2
How do fuses and circuits work together?
A

Fuses supply electricity to circuits

B

Circuits protect fuses from overheating

C

Fuses monitor the flow of electricity in circuits

D

Circuits control the temperature of fuses

3
What does an electric meter measure?
A

Water consumption

B

Gas usage

C

Electricity usage

D

Air pressure

4
Where is an electric meter usually located?
A

Inside the refrigerator

B

Outside the home

C

In the basement

D

Under the sink

5
What is the function of an electric meter?
A

To measure internet speed

B

To track the number of phone calls made

C

To monitor electricity consumption

D

To regulate room temperature

6
How does a fuse protect an electrical circuit?
A

By increasing the voltage

B

By decreasing the resistance

C

By breaking the circuit if there is too much current

D

By controlling the frequency of electricity

7
Which component measures electricity usage in a home?
A

Circuit breaker

B

Light switch

C

Electric meter

D

Power outlet

8
What happens if a fuse blows?
A

The circuit becomes stronger

B

The circuit breaks

C
The electricity flow increases
D

The circuit overheats

9
Where is a fuse typically placed within an electrical circuit?
A

At the power station

B

At the end of the circuit

C

Randomly along the circuit

D
At strategic points within the circuit
10
How does an electric meter transmit usage data?
A
Via radio signals
B

Through internet connection

C

Using telephone lines

D

By physical mail