Question Detail
Question
A transformer has 200 turns in its primary coil and 600 turns in its secondary coil. If the current in the primary coil is 12.0 A, what is the current in the secondary coil?
Correct Answer
Option B is the correct answer.
Detailed Explanation
For an ideal transformer, the ratio of the number of turns is inversely proportional to the ratio of the currents:Np / Ns = Is / IpWhere Np is primary turns, Ns is secondary turns, Ip is primary current, and Is is secondary current.Given: Np = 200, Ns = 600, Ip = 12.0 A.200 / 600 = Is / 12.01 / 3 = Is / 12.0Is = 12.0 / 3 = 4.0 A.
Hint
Recall the transformer equation relating turns ratio and current ratio.