JAMB - Physics (1981 - No. 40)
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
5 volts
10 volts
15 volts
20 volts
25 volts
Förklaring
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
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