What are two ways to cause a current in a wire coil?

Answer 1

Different ways to induce current in a coil are as given below:

(1) If a magnetic field is changed round a coil then an induced current is set up in the coil. It can be done by taking a bar magnet and bringing it closer to the coil or taking it away from the coil.

(2) If a coil is moved in a magnetic field, then again an induced current is set up in the coil.

(3) If a coil is rotated in a uniform magnetic field, it may also cause an induced current in the coil.

(4) If we take two 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.

Comment

You don't induce a 'current' into a coil; you induce a voltage. If that coil is open circuited, then no current will flow. If, on the other hand, the coil is connected to a load, or its opposite ends short-circuited, then the induced voltage will cause a current to flow. Remember, current will only flow if there is a load, or short circuit, and the value of the current will depend upon the value of the induced voltage and the resistance of the load or short circuit.

Answer 2

Apply voltage to it. Pass a magnet near it.