Question on: JAMB Physics - 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 Option: A
(\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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