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A generator at a utility company produce...

A generator at a utility company produces 100 A of current at 4000 V. The voltage is stepped up to 240000 V by a transformer before it is sent on a high voltage transmission line. The current in transmission line is

A

3.67 A

B

2.67 A

C

1.67 A

D

2.40 A

Text Solution

Verified by Experts

The correct Answer is:
C
For step-up transforer, `V_(s) gtV_(P)` and `I_(S) lt I_(P)`
For an ideal transformer,
`V_(S)I_(S) = V_(P)I_(P)`
`therefore 240000I_(S) = 100 xx 4000`
or `I_(S) = 1.67 A`
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