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Q.

Primary side of a transformer is connected to 230V, 50Hz ac source. The turn ratio of primary to secondary winding is 10:1. If a load resistance of $46 Ω$ is connected in the secondary, the power consumed in it is

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a

95 W

b

11.5 W

c

8.5 W

d

10.5 W

answer is D.

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Detailed Solution

$\frac{V_{S}}{V_{P}} = \frac{N_{S}}{N_{P}} \Rightarrow \frac{V_{S}}{230} = \frac{1}{10} \Rightarrow V_{S} = 23 V$
$Power = \frac{V^{2}}{R}$

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