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 hi

Question

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 hi

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

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - 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`

5 views Answered 2023-02-05 15:29