Primary coil of a transformer is connected to 220VAC . Primary and secondary turns of the transforms are 100 and 10 respectively. Secondary coil of transformer is connected to two series resistances as shown in figure.

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Correct answer: A. 7V

Primary coil of a transformer is connected to 220VAC . Primary and secondary turns of the transforms are 100 and 10

Ratio of EMF developed will be given by,

$\dfrac{{ε}_{p}}{{ε}_{s}} = \dfrac{{N}_{p}}{{N}_{s}} = \dfrac{100}{10} ⇒ {ε}_{s} = 22V$

Therefore, current in secondary circuit will be

$I = \dfrac{22}{22 \times {10}^{3}} = 1mA$

Hence, potential drop across $7kΩ$ will be ${V}_{0} = I \times 7kΩ = 7V$

Primary coil of a transformer is connected to 220VAC . Primary and...

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