Primary side of a transformer is connected to 230 V, 50 Hz supply. Turns ratio of primary to secondary winding is 10 : 1. Load resistance connected to secondary side is 46 ?. The power consumed in it is

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Solution

Q.
Primary side of a transformer is connected to 230 V, 50 Hz supply. Turns ratio of primary to secondary winding is 10 : 1. Load resistance connected to secondary side is 46 Ω. The power consumed in it is [2024]

1 12.5 W

2 10.0 W

3 11.5 W

4 12.0 W

Ans.
(3)

$\frac{V_{1}}{V_{2}} = \frac{N_{1}}{N_{2}}$

   $\frac{230}{V_{2}} = \frac{10}{1}$

   $V_{2} = 23 V$

   $Power consumed = \frac{V_{2}^{2}}{R} = \frac{23 \times 23}{46} = 11.5 W$

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