Electro Magnetic Induction And Alternating Currents Question 218
Question: A step up transformer operates on a 230 V line and supplies a current of 2 ampere. The ratio of primary and secondary winding is 1:25. The current in primary is
Options:
A) 25 A
B) 50 A
C) 15 A
D) 12.5 A
Show Answer
Answer:
Correct Answer: B
Solution:
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$ \frac{n_{p}}{n_{s}}=\frac{E_{p}}{E_{s}}=\frac{1}{25} $
$ \therefore E_{s}=25E_{p} $But $ E_{s}I_{s}=E_{p}I_{p}\Rightarrow \frac{E_{S}\times I_{S}}{E_{p}}\Rightarrow I_{p}=50A $
