JAMB - Physics (1985 - No. 42)
A transformer has a primary coil with 500 turns and a secondary coil with 2500 turns. When the voltage input to the primary coil is 120V, the output is
6000V
600V
240V
60V
24V
Explicaţie
For transformers, \(\frac{V_p}{V_s}\) = \(\frac{N_p}{N_s}\) = \(\frac{I_p}{I_s}\)
\(\frac{500}{2500}\) = \(\frac{120}{V_s}\)
Vs = 600v
\(\frac{500}{2500}\) = \(\frac{120}{V_s}\)
Vs = 600v