Q. In a transformer 220 ac voltage is increased to $2200\ volts$. If the number of turns in the secondary are 2000, then the number of turns in the primary will be
A) 200
B) 100
C) 50
D) 20
Explanation
(a) $\frac{V_{p}}{V_{s}} = \frac{N_{p}}{N_{s}} \Rightarrow N_{p} = \left( \frac{220}{2200} \right)2000 = 200$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.