Question on: JAMB Physics - 2020
A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the input voltage isÂ
A
5 volts
B
10 volts
C
15 volts
D
20 volts
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Correct Option: B
Es = e.m.f. of the secondary coilÂ
Ep = NpÂ
Np = e.m.f. of secondary coilÂ
Ns = number of turns in secondary coilÂ
Ns = number of turns in primary coilÂ
\(\frac{30}{300}\) = \(\frac{x}{100}\) = 300Â
X = 3000Â
X = 10 voltsÂ
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