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

Options

A. 12.5A
B. 50 A
C. 8.8 A
D. 25 A

Answer

B

Explanation

As we know that for transformer, `(V_(1))/(V_(2))=(I_(1))/(I_(1))=(N_(1))/(N_(2))`
where all the symbols have their usual meanings.
(suffix 1 is for primary and 2 is for the secondary)
`implies (N_(1))/(N_(2))=(1)/(25)=(2)/(I)`
where, I=primary.
`I=50A`