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Question

A step-up transformer operates on a $$230$$V line and a load current of $$2$$A. The ratio of primary and secondary windings is $$1:25$$. Then the current in the primary is?


A
25 A
loader
B
50 A
loader
C
15 A
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D
12.5 A
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Solution

The correct option is B $$50$$ A
$$\dfrac{I_p}{I_s}=\dfrac{N_s}{N_p}$$
$$\Rightarrow \dfrac{I_p}{2}=\dfrac{25}{1}$$
$$\Rightarrow I_p=50A$$.

Physics
NCERT
Standard XII

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