Question

A 12 V, 60 W lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of 220 V. Assuming the transformer to be ideal, what is the current in the primary winding?

(1) 2.7 A

(2) 3.7 A

(3) 0.37 A

(4) 0.27 A

Answer 1

Correct option is (4) 0.27 A