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AC Generator & Transformer question from NEET 2021

Q41NEET 2021Easy

AC Generator & Transformer

A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?

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Answer: (b)

No losses: $V_pI_p = P_{lamp} = 44\text{ W}$ .
$I_p = \dfrac{44}{220} = 0.2\text{ A}$
So the answer is (b) 0.2 A.

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