When the magnet shown in the diagram below is moving towards the coil, the galvanometer gives a reading to the right.
(i) What is the name of the effect being produced by the moving magnet?
(ii) State what happens to the reading shown on the galvanometer when the magnet is moving away from the coil.
(iii) The original experiment is repeated. This time the magnet is moved towards the coil at a great speed. State two changes you would notice in the reading on the galvanometer.
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The name of the effect that is being produced by moving the magnet is electromagnetic induction.
Explanation:
(a) This effect helps to produce an induced current in the coil when the magnet is moved.
(b) The galvanometer will deflect to the left side when the magnet is moving away from the coil.
(c) When the magnet is moved towards the coil with a greater speed we see two changes:
1) The galvanometer is deflected to the ride side more.
2) The galvanometer deflects quickly.
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