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 output voltage is
A
5 volts
B
10 volts
C
15 volts
D
20 volts
E
25 volts
Verified Correct Answer: B.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #29041)