When primary coil P is moved towards secondary coil S, Fig. the galvanometer shows memetary deflection in the can be done to have larger deflection in the galvanometer with same battery ? State the related law ?

Explanation

To have larger deflection in the galvanometer with the same battery. Coil P has to be moved faster toward S.
The law governing this phenomenon is Faraday's 2nd law of electromagnetic induction.