The primary of an ideal transformer has 100 turns and its secondary has 200 turns. If the input current at the primary is 100 A, we can expect the output current at the secondary to be
A) 100 A.
B) 50 A.
C) 200 A.
D) none of the given answers.

Question

Quizplus · Accepted Answer

The output current can be calculated using the transformer turns ratio, which is the ratio of the number of turns in the primary coil to the number of turns in the secondary coil. For an ideal transformer, the input power equals the output power, so $V_pI_p = V_sI_s$, where $V$ is voltage, $I$ is current, $p$ denotes primary, and $s$ denotes secondary. Given the turns ratio of 1:2 (100 turns in the primary to 200 turns in the secondary), the current in the secondary will be half of the current in the primary, making the correct answer 50 A.

The Primary of an Ideal Transformer Has 100 Turns and Its