Q. A transformer of efficiency 90% draws an input power of 4 kW. An electrical appliance connected across the secondary draws a current of 6 A. The impedance of the device is
A) 60$\ \Omega$
B) 50$\ \Omega$
C) 80$\ \Omega$
D) 100$\ \Omega$
Explanation
The correct answer is Option C: 80$\ \Omega$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.