1.

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 ?

Answer»

`1//20 A`
20 A
100 A
`2 A`

SOLUTION :`(N_(s))/(N_(p)) = (V_(s))/(V_(p))`
`(50)/(1000) = (V_(s))/(220)`
`V_(s) = 11 V`
`V_(s)I_(s) = V_(p)I_(p)`
`11 xx I_(s) = 220 xx 1`
`I_(s) = 20 A`


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