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Physics · 2025 · 1 mark
CBSE 2025 · Region 1 · Set 3 · Q4
The ratio of the number of turns of the primary to the secondary coils in an ideal transformer is 20: 1. If 240 V ac is applied from a source to the…
The ratio of the number of turns of the primary to the secondary coils in an ideal transformer is $\displaystyle 20: 1$. If $\displaystyle 240$ V ac is applied from a source to the primary coil of transformer and a $\displaystyle 6.0 \Omega$ resistor is connected across the output terminals, then current drawn by the transformer from the source will be-
Official answer
(D)
$\displaystyle \frac{8}{9}$
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CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.