A transformer has 500 turns on the primary and 100 turns on the secondary. If 220 V AC is applied to the primary, what is the secondary voltage?
A44 V
B1,100 V
C220 V
D4.4 V
Explanation
📌 V_s/V_p = N_s/N_p → V_s = 220 × (100/500) = 44 V. Step-down transformer. Distractor B: inverted ratio; C: no change; D: extra factor of 10.