Question

A step-down transformer is connected to `2400` volts line and `80` amperes of current is found to flow in output load. The ratio of the turns in primary and secondary coil is `20:1.` if transformer efficiency is `100%`, then the current flowing in primary coil will be
A. `15A`
B. `50A`
C. `25A`
D. 12.5A`

Answer 1

Correct Answer - B
`(N_(s))/(N_(p))=(i_(p))/(i_(s))or (25)/(1)=(i_(p))/(2)impliesi_(p)=50A`