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A step-down transformer is used on a 100...

A step-down transformer is used on a `1000 V` line to deliver `20A` at `120V` at the secondary coil. If the efficiency of the transformer is `80%` the current drawn from the line is.

A

`3 A `

B

`30 A`

C

`0.3 A`

D

` 2.4 A`

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