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UPSC 1996: Assertion (A): Transformer is useful for stepping up or stepping down voltages. Reason (R): Transformer is a device used in D.C. circuits. In the context of the above two statements, which one of the following is correct?
(a)Both A and R are true and R is the correct explanation of A.
(b)Both A and R are true but R is not a correct explanation of A.
(c)A is true but R is false.
(d)A is false but R is true.
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Not attemptedCorrect Answer: (c) A is true but R is false.
Assertion is true because a transformer changes AC voltage levels by electromagnetic induction. The reason is false: transformers need alternating current; with steady DC no mutual induction occurs and the core would saturate. Hence A is true but R is false. ([scribd.com](https://www.scribd.com/document/731910047/1996))
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What is the correct answer to this UPSC 1996 Science & Technology question?▼
The correct answer is option (c): A is true but R is false.. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1996, GS Paper 1, as Question 121. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.