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

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
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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