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Physics · PYQ NEET UG 2021
हिन्दीA step down transformer connected to an ac mains supply of \( 220 \text{ V} \) is made to operate at \( 11 \text{ V}, 44 \text{ W} \) lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?
Correct answer · Option 4
\( 0.2 \text{ A} \)
Explanation
Using conservation of power \( V_p I_p = P_{output} \), we get \( 220 \times I_p = 44 \text{ W} \Rightarrow I_p = \frac{44}{220} = 0.2 \text{ A} \).
