Question

(i) What will happen to the conductor when the key is
switched on and current flows through the conductor.
Give reason for your expected observation.
(ii) Name a device which works on this principle.
(iii) What do you expect when the direction of current
through the conductor is reversed? State the rule used
to explain your expected observation:-
OR​

Answer 1

1)Answer: Electric switch is commonly known as the key of an electric circuit. When the key is closed, current flows through the circuit, and when the key is opened, current stops flowing through the circuit.

2)Answer: The electric generators and dynamos uses rotating magnets to induce an electric current in conducting wire coils surrounding the generator's armature.