The current in the secondary coil of a transformer is 1A and that in the primary is 0.5 A.

If 200 V is available in the secondary coil of this transformer, what is the voltage in the primary?

Copper wires of the same length and thickness are connected to points A and B in all the three circuits. In circuit (a) copper wire is not coiled. In circuits (b) and (c), the copper wire is coiled. Observe the circuits and answer the following questions.

(a) When circuit (a) is switched on, what do you observe?

(b) When circuit (b) is switched on, what change do you observe in the intensity of light? Justify your answer.

(c) When circuit (c) is switched on, what change do you observe in the intensity of light? Justify your answer.

The current in the secondary coil of a transformer is 1A and that in the primary is 0.5 A.

What type of a transformer is this?

The current in the secondary coil of a transformer is 1A and that in the primary is 0.5 A.

Explain the working principle of a transformer.

In connection with the working of a microphone, a few statements are given in boxes.

Arrange them in the proper order.