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Question

Physics Question on Alternating current

A step-up transformer operates on a 230 V line and a load current of 2 A. The ratio of primary and secondary windings is 1 : 25. Then the current in the primary is

A

25 A

B

50 A

C

100 A

D

12.5 A

Answer

50 A

Explanation

Solution

ESEP=NSNP=IPIS\frac{E_{S}}{E_{P}} = \frac{N_{S}}{N_{P}} = \frac{I_{P}}{I_{S}}
Ip=NSISNPI_{p} = \frac{N_{S}I_{S}}{N_{P}}
=251×2= \frac{25}{1} \times2
=50A= 50 \,A