Question

Assertion (A): A step-up transformer cannot be used as a step-down transformer.

Reason (R): A transformer works only in one direction.

Options

• Both (A) and (R) are true, and (R) is correct explanation of (A).

• Both (A) and (R) are true, and (R) is not correct explanation of (A).

• (A) is true, but (R) is false.

• (A) is false and (R) is also false.

Answer 1

Both (A) and (R) are true, and (R) is not correct explanation of (A).

Explanation:

A step-up transformer cannot function as a step-down transformer or vice versa. This assertion is true.
The transformer is, therefore, a one-way device. The reason is also correct. The reason is true. However, the explanation doesn't clarify the claim.