Practice MCQs For For Static Electricity, Current Electricity, D.C. Circuits and Practical Electric Circuitry

This quiz contains practice questions for GCE ‘O’ level topics: Static Electricity, Current Electricity, D.C. Circuits and Practical Electric Circuitry. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

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1. A house-owner replaces a failed fuse for the lights of the house. When the lights are switched on, the second fuse also fails. The house-owner then uses a third fuse with a higher rating than the previous two.

Why is this not a sensible thing to do?

Using a fuse with too high a rating causes electric shocks.

The third fuse will melt because the rating is too high.

The circuit may work, but the fault is not corrected.

Fuses only allow the circuit to work if the rating is exactly right.

2. A negatively-charged strip is brought near to, but not touching, an uncharged conductor. If the conductor is earthed, it

becomes positively charged on one side and negatively charged on the other.

is repelled by the strip.

is attracted by the strip.

remains uncharged.

3. Electromotive force is defined as ____________.

the work done by an appliance in driving electrons around a circuit.

the product of current and resistance.

the work done by a source in driving a unit charge around a circuit.

the work done to drive a unit charge through a component.

4. A $1.0 \, \Omega$ resistor and a $2.0 \, \Omega$ resistor are connected in series across a 12 V D.C. supply.

What is the current in the circuit?

0.25 A

12 A

4.0 A

6.0 A

5. Which diagram correctly shows the electric field lines between two point charges?

D

C

A

B

6. A plug connected to a table lamp contains a 3 A fuse. The fuse is needed

to protect the wiring from overheating

to increase the resistance of the circuit

to reduce the voltage across the lamp

to make it easier for the current to flow

7. Four processes are used to charge an isolated metal sphere.

P: The sphere is earthed by touching it.

Q: The earth connection is removed from the sphere.

R: A charged rod is brought close to the sphere.

S: The charged rod is removed.

2

1

4

3

8. A battery containing 1200 C of charge is connected to a circuit. What is the time taken to discharge the battery if the current in the circuit is 6 A?

200 hours

2 hours

200 seconds

20.0 seconds

9. Which combination of identical resistors gives the lowest total resistance?

B

A

D

C

10. X and Y are lamps with filaments made from the same material.

The filament of lamp X is thicker and shorter than that of lamp Y.

When connected to the mains and switched on, which is the brighter lamp and which lamp has the larger resistance?

A

B

D

C

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