Q.

Assertion (A): A step-up transformer cannot be used as a step-down transformer.
Reason (R): A transformer works only in one direction

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a

(A) is true, but (R) is false

b

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

c

(A) is false and (R) is also false

d

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

answer is D.

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Detailed Solution

Explanation: Any transformer can be turned around to convert it into other form by reversing primary and secondary coils. [i.e. primary becoming secondary coils and secondary becoming primary coils]

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