Question

Assertion (A): The a.c. motor is based on the principle of electromagnetic induction.

Reason (R): The direction of induced current in coil is given by Faraday's right hand rule.

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:

An a.c. machine working on electromagnetic induction, such as an a.c. generator or an induction-type a.c. motor, works because the changing magnetic flux linked with the coil induces an e.m.f. So the assertion is true. But the direction of the induced current is given by Fleming's right-hand rule, not Faraday's right-hand rule. Therefore, the reason is false.