Electro Magnetic Induction And Alternating Currents Question 257

Question: A step-up transformer operates on a 230 V line and supplies a load of 2 ampere. The ratio of the primary and secondary windings is 1 : 25. The current in the primary is [CBSE PMT 1998]

Options:

A) 15 A

B) 50 A

C) 25 A

D) 12.5 A

Show Answer

Answer:

Correct Answer: B

Solution:

$ \frac{N_{s}}{N_{p}}=\frac{i_{p}}{i_{s}} $ or $ \frac{25}{1}=\frac{i_{p}}{2}\Rightarrow i_{p}=50A $



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