Q. A step-up transformer has transformation ratio of 3 : 2. What is the voltage in secondary if voltage in primary is $30\ V$
A) $45\ V$
B) $15\ V$
C) $90\ V$
D) $300\ V$
Explanation
(a) $\frac{V_{s}}{V_{p}} = \frac{N_{s}}{N_{p}} = k \Rightarrow \frac{V_{s}}{30} = \frac{3}{2} \Rightarrow V_{s} = 45\ V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.