A step down transformer has 50 turns on secondary and 1000 turns on primary winding. If a transformer is connected to 220 V 1 A A.C. source, what is output current of the transformer ?

Options

A. 100 A
B. `1/20`A
C. `2 A`
D. 20 A

Answer

D

Explanation

As `(I_(p))/(I_(s))=(N_(s))/(N_(p))`
where subscripts 'p' and 's' represent primary and secondary.
`:.I_(s)=((N_(p))/(N_(s)))I_(p)`
Here,
`I_(p)=1A, N_(p)=1000, N_(s)=50`
`:.I_(s)((1000)/(50))(1A)=20A`
Hence the output current of the transformer is 20 A.