Though currently there is little scientific evidence to suggest that magnetic therapy is an effective treatement of any medical condition, yet one of your friends is wearing a magnetic bracelet for pain relief. What symptoms should warrant your friend to discontinue its use?
or
A coil of copper wire is connected to a galvanometer. What would happen if a bar magnet is : (i) pushed into the coil with north pole entering first (ii) pulled out of the coil (iii) held stationary inside the coil.