Question

mention two ways to induce electric current in a given coil

Answer 1

Electric current can be induced in a coil due to the relative motion between the coil and a magnetic field.

There are two ways to do so.

1. Inducing current on a coil by moving the coil in a magnetic field

2. Inducing current on a coil by by changing the  magnetic field across it.

3. By taking two cunductiong coils and insert them over a non conducting cylindrical roll then on changing current flowing in one coil, an induced current is obtained in the other coil.

Note:  

Convenient way is to induce current is to move coil inside magnetic field.

Answer 2

by cooling more and more