Consider Experiment:
(a) What would you do to obtain a large deflection of the galvanometer ?
(b) How would you demonstrate the presence of an induced current in the absence of a galvanometer ?

Explanation

(a) Following are different ways to increase the deflection in the galvanometer.
(i) We can increase no. of turns of a coil. (ii) We can have turns of a coil with greater area.
(iii) We can keep ferromagnetic core at the centre of coil.
(iv) We can increase the speed of bar mag net shown in experiment 6.2.
(b) We can replace galvanometer by a small bulb. Whenever induced current flows through this bulb, it glows which indirectly proves the existence of induced current.