Question

Assertion: Transformers are used only in alternating current source not in direct current.
Reason: Only a.c. can be stepped up or down by means of transformers.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

Transformers which convert low voltages into higher ones are called step-up transformers, while those which convert high voltages into lower ones are called step-down transformers. This is possible only for a.c. source and not for d.c. source.