The primary of a transformer has 100 turns and its secondary has 200 turns. If the voltage at the primary is 100V, determine the voltage at the secondary.
-
A.
50V -
B.
100V -
C.
200V -
D.
400V
Correct Answer: Option C
Explanation
The ideal transformer (either step-up or step-down) works with the equation:
(frac{V_{s}}{V_{p}} = frac{N_{s}}{N_{p}} = frac{I_{p}}{I_{s}})
where (V_{s}) and (V_{p}) are the voltages applied to the secondary and the primary respectively
(N_{s}) and (N_{p}) are the number of turns on the secondary and primary coils respectively
(I_{p}) and (I_{s}) are the currents flowing in the primary and secondary coils respectively.
(frac{V_{s}}{100} = frac{200}{100})
(V_{s} = frac{200times 100}{100} = 200V)