Assertion (A): A domestic electrical appliance working on a three point socket will continue working even if the top pin is removed.

Reason (R): The third pin is used only as a safety device.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

both A and R are true and R is the correct explanation of A

Explanation

Assertion (A) is true because when domestic appliance are connected to a three-pin socket, the current flows through only the live and neutral wires, which are sufficient for its functioning while third pin is for earthing which is essential for safety but is not essential for working of an appliance.

Reason (R) is true because the third (top) pin is the earth wire, which does not participate in normal current flow and it is used purely as a safety measure to prevent electric shock by providing a low-resistance path for leakage current.

Here, the Reason (R) justifies the Assertion (A) because the appliance works using only the live and neutral wires and the third pin (earth) is only for safety and not required for normal operation. Therefore, even if it is removed, the appliance still works.

Hence, both A and R are true and R is the correct explanation of A.