Question

 What do you understand by the term "electromagnetic induction"? Explain with the help of a diagram. 

Answer 1

 In case of relative motion between a source of magnetic field and conductor, current flows inside the conductor. This phenomenon is called electromagnetic induction. For example, when a bar  magnet is moved towards a coil of wire attached to a galvanometer, a deflection in galvanometer needle is observed due to induced current as shown in the figure.