Question

A transformer has 10 loops on its primary coil and 20 loops on its secondary coil. If the primary coil is supplied with 120 V, what is the voltage in the secondary coil?

a) 6 V
b) 60 V
c) 240 V
d) 20 V

Answer 1

By applying the transformer equation, we find that the secondary voltage for a transformer with 10 loops on the primary coil and 20 loops on the secondary coil and a 120 V input on the primary, is 240 V.

Step-by-step explanation:

When dealing with a transformer, the primary and secondary voltages are related to the number of turns in the primary and secondary coils by the transformer equation:

Vp / Vs = Np / Ns

secondary coil.

Given that a transformer has 10 loops on its primary coil and 20 loops on its secondary coil, supplied with 120 V in the primary, we can find the voltage in the secondary coil as follows:

120 V / Vs = 10 turns / 20 turns

Vs = 120 V × (20 turns / 10 turns)

Vs = 240 V

Therefore, the voltage in the secondary coil is 240 V, which corresponds to option c.