A transformer has 400 turns and 200 turns in the primary and secondary windings respectively. If the current in the primary and secondary windings are 3A and 5A respectively. calculate the efficiency of the transformer? By: Sunday|Published on: May 22|Categories: Physics WAEC| 0 comments A. 85.0% B. 83.3% C. 37.5% D. 30.0% Correct Answer: Option B B. 83.3% Users Also Read These:Calculate the number of turns in the secondary coil…A step-down transformer has a power output of 50 W…The primary coil of a transformer has N turns and is…A transformer with 5500 turns in its primary winding…A transformer is rated 240V. If the primary coil is…SEE ALSO In a wave the maximum displacement of particles from their equilibrium positions is called?