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

Options

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

Answer

B

Explanation

(b) `because (V_(1))/(V_(2))=(N_(1))/(N_(2)) `
`(V_(1))/(V_(2))=(1000)/(50)=20`
`V_(2)=(220)/(20)` =11V
If transformer is ideal power across primary and secondary coils is the same:
`I_(1)V_(1)= I_(2) V_(2)`
`Ixx220=I_(2)xx11`
`I_(2)=20A`