Q. The ratio of turns in primary and secondary coils of a transformer is 1 : 20. The ratio of currents in primary and secondary coils will be
A) 1 : 20
B) 20 : 1
C) 1 : 400
D) 400 : 1
Explanation
(b) $\frac{n_{P}}{n_{s}} = \frac{1}{20}$
As $\frac{i_{P}}{i_{s}} = \frac{n_{s}}{n_{P}}$
$\therefore\ \ \ \frac{i_{P}}{i_{s}} = 20\ :1$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.