A current of 5 A is flowing at 220 V in the primary coil of a transformer . If the voltage produced in the secondary coil is 2200 V and `50%` of power is lost, then the current in the secondary will be

Options

A. `0.25 A`
B. `0.5 A`
C. `2.5 A`
D. `5 A`

Answer

A

Explanation

Given the power output is `50%` of the input power , is `i_(s)V_(s)=(1//2)i_(p)V_(p)`.
Also given `i=5A,V_(p)=220VandV_(s)=2200V`.
`thereforei_(s)=(1)/(2)(i_(p)V_(p))/(V_(s))rArri_(s)=(1)/(2)xx(5Axx220V)/(2200V)`
`thereforei_(s)=0.25A`.