The primary coil of a transformer has 100 turns and its secondary coil has 400 turns.If the ac voltage applied to the primary coil is 120 V,what voltage is present in its secondary coil?
A) 100 V
B) 30 V
C) 70 V
D) 480 V
E) 400 V

Question

Quizplus · Accepted Answer

The voltage ratio of a transformer is equal to the turns ratio. Therefore, the voltage in the secondary coil will be:
V_secondary = (N_secondary / N_primary) * V_primary
where N_primary = 100, N_secondary = 400, and V_primary = 120 V. Plugging in the values gives:
V_secondary = (400 / 100) * 120 V = 480 V. 
Therefore, the correct answer is D, 480 V.

The Primary Coil of a Transformer Has 100 Turns and Its