Q. A low-loss transformer has 230 V applied to the primary and gives 4.6 V in the secondary. Secondary is connected to a load, which draws 5 A of current. The current (in ampere) in the primary is
A) 0.1
B) 1.0
C) 10
D) 250
Explanation
(a) $\frac{E_{S}}{E_{P}} = \frac{i_{P}}{i_{S}} \Rightarrow i_{P} = \frac{E_{S}}{E_{P}} \times i_{S} = \frac{4.6}{230} \times 5 = 0.1$ A
Frequency is not affected by transformer.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.