Question

Assertion (A): When a room heater is switched on, its heating element gets red hot, but the connecting wires do not heat up.

Reason (R): Connecting wires are of more resistance than heating element.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Assertion (A) is true, but Reason (R) is false.

Explanation:

The heating element is made of a high-resistance alloy like nichrome, while the connecting wires are made of low-resistance copper. The heat produced is H = I²Rt, so the heating element produces much more heat. The reason is false because connecting wires have less resistance than the heating element, not more.