Correct Answer: Option B

Explanation

for transformer,

Es = Ns, Es = e.m.f of secondary

Ep = Np, Ep = e.m.f of primary

NS = number of turns in secondary

Ns = number of turns in primary

\(\frac{30}{300}\) = \(\frac{x}{100}\)

300X = 3000X

= 10 volts

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