The primary winding of a transformer has 400 turns and its secondary has 100 turns....

JAMB 1995

The primary winding of a transformer has 400 turns and its secondary has 100 turns. If a source of e.m.f. of 12V is applied to the primary, the secondary e.m.f. will be

A. 3V
B. 6V
C. 24V
D. 48V

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Correct Answer: Option A

Explanation

\(\frac{V_s}{V_p}\) = \(\frac{N_s}{N_p}\) = \(\frac{I_p}{I_s}\)

\(\frac{100}{400}\) = \(\frac{V_S}{12}\)

V = 3V

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The primary winding of a transformer has 400 turns and its secondary has 100 turns....

Correct Answer: Option A

Explanation

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