Question

Assertion(A): Electric bulb glows when the switch is turned ON in an electric circuit.
Reason(R): Electric switch acts like a conductor in an electric circuit when it is in the ON position.

• A. Both A and R are true, but R is not the correct explanation of A.
• B. Both A and R are true and R is the correct explanation of A.
• C. A is false, but R is true.
• D. A is true, but R is false.

Answer 1

The correct option is B Both A and R are true and R is the correct explanation of A.

Electric switch acts like a conductor when it is in the ON position and allows the current to flow in a circuit by completing the circuit.

On the other hand, when the switch is in the OFF position, the circuit becomes open and the air gap between the switch terminal acts like an insulator of current and thus does not allow the current to flow.
So, bulb only glows in an electric circuit when switch is in ON position.