JAMB Physics 1984 Question 50

Fig. 9 above represents an insulated cylindrical coil of copper wire wound round a paper tube. The ends of the coil are connected to a sensitive galvanometer. When a magnet was plunged into the coil it was observed that the galvanometer needle gave a deflection. Which of the following correctly describes this experiment?

1. A.The effect illustrated is induced electromotive force
2. B.The strength of the current produced is inversely proportional to the speed with which the magnet is plunged into the coil.
3. C.The direction of the current is always such as to enhance the change producing it
4. D.The galvanometer gave a permanent deflection
5. E.On removing the magnet from the coil the galvanometer deflected in the same direction.