CAIE IGCSE Physics 4.5.1.3 Factors Affecting the Magnitude of an Questions

Learn how speed, magnetic field strength and coil turns affect induced e.m.f., and how generators produce electrical output.

Exam points

describe how relative motion between a magnet and coil induces an e.m.f. and galvanometer deflection
state how speed, magnetic field strength and number of coil turns affect the size of induced e.m.f.
explain how a simple generator uses a rotating magnet or coil to produce an alternating electrical output

[Maximum number: 1]

Fig. 9.1 shows a magnet on the end of a spring and a coil of wire connected to a sensitive centre-zero galvanometer. The magnet can move freely through the coil.

Fig. 9.1

The magnet is replaced with a stronger magnet.

State the effect of using a stronger magnet on what happens to the needle of the galvanometer.

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CAIE IGCSE Physics 4.5.1.3 Factors Affecting the Magnitude of an Questions question 1