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.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Transformers which convert low voltage into higher ones are called step-up transformers, while those which convert high voltage into lower ones are called step-down transformers. This is possible only for a.c. source and not for d.c. source.

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(a) Both assertion and reason are correct and the reason is correct explanation of assertion
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(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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