Practice MCQs For Magnetism & Electromagnetism

This quiz contains practice questions for GCE ‘O’ level topic: Magnetism & Electromagnetism. 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.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

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1. The diagrams show a small compass close to a strong bar magnet.

Which diagram shows the correct compass direction?

Magnet Qn 9
2. A vertical wire passes at right angles through a piece of card. There is a large current in the wire in the direction shown.

Magnet Qn 13A plotting compass is placed on the card.

Which diagram shows the direction in which the needle of the plotting compass points?

Magnet Qn 14
3. A magnet is placed close to an iron bar.

Magnet Qn 15The iron bar becomes an induced magnet.

Which magnetic poles are formed at the ends X and Y of the bar?
End XEnd Y
4. Why is a transformer used to connect a generator in a power station to a long distance transmission line?
5. Which of the following has no effect on the size of turning effect on the coil of an electric motor?
6. Which statement about the action of a transformer is correct?
7. The diagram shows part of a magnetic relay. M is part of the core of the magnet. L is part of the armature which is attracted to the core when a current flows through the coil. S is a stud which stops the armature being attracted too strongly.

Magnet Qn 29Which line of the table gives the best materials for M, L and S?
8. What always produces a permanent bar magnet?
9. The diagram shows the magnetic field pattern of a current in a solenoid.

Magnet Qn 5When the current in the solenoid is increased, where is there an increase in the magnetic field strength?
10. A simple a.c. generator produces an alternating e.m.f. as shown.

ac gen 1The speed of the generator is doubled.

Which graph best represents the new output?

ac gen 2


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