Revision: Electromagnetic Induction

20 Electromagnetic Induction - Revision Quiz

Test your understanding of Electromagnetic Induction here:

1 / 5

1) 2014 S4 EOY P1 Q26

The diagram below shows a battery completing a circuit of a metal rod resting on two metal bars. The metal rod is located in a magnetic field that is directed perpendicularly into the page.

How will the metal rod move?

The rod will move to the right.

The rod will rotate clockwise.

The rod will move to the left.

The rod will rotate anticlockwise.

2 / 5

2) 2018 S4 EOY P1 Q30

The diagram below shows two different power transmission systems, X and Y, which transmit power to a heater with rating ‚"220 V, 484 W".

The total resistance of the transmission cables in both systems are 10 Ω.
In system Y, assume there is no power loss in the transformers and in the circuits P and Q.

What is the ratio of the power loss in transmitting power in system X to that in system Y?

25:1

20:1

15:1

10:1

3 / 5

3) 2015 S4 EOY P1 Q28

The diagram shows an a.c. generator.

Which of the following changes will increase the magnitude of the alternating voltage output without changing its frequency?

(i) Increase the speed of rotation of the rectangular coil about the axis XY.
(ii) Increase the number of turns in the rectangular coil.
(iii) Use stronger permanent magnets.
(iv) Wind the rectangular coil around a copper core.

(ii), (iii) and (iv) only

(i) and (iii) only

(i), (ii) and (iii) only

(ii) and (iii) only