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?

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?, 0 . 37 A, 0 . 27 A, 2 . 7 A, 3 . 7 A

MARKS App · Accepted Answer

For an ideal transformer, P o w e r i n p u t = P o w e r o u t p u t ⇒ V P I P = P o w e r o u t p u t ⇒ I P = 60 220 ≈ 0 . 27 A

Search any question & find its solution

Looking for more such questions to practice?