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A step-down transformer is connected to ...

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

1600 A

B

20 A

C

`4A`

D

1.5 A

Text Solution

Verified by Experts

The correct Answer is:
C
`(I_(P))/(I_(S))=(n_(S))/(n_(P))`
`therefore I_(P)=(n_(S))/(n_(P))xxI_(S)=(1)/(20)xx80=4A`
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