Q. The output voltage of a transformer connected to $220\ volt$ line is $1100\ volt$ at $2\ amp$ current. Its efficiency is 100%. The current coming from the line is
A) $20\ A$
B) $10\ A$
C) $11\ A$
D) $22\ A$
Explanation
(b) For 100% efficiency $V_{s}i_{s} = V_{p}i_{p}$
$\Rightarrow 1100 \times 2 = 220 \times i_{p} \Rightarrow i_{p} = 10\ A$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.