Electro Magnetic Induction And Alternating Currents Question 220

Question: A generator at a utility company produces 100 A of current at 4000 V. The voltage is stepped up to 2, 40, 000V by a transformer before it is sent on a high voltage transmission line. The current in transmission line is

Options:

A) 3.67 A

B) 2.67 A

C) 1.67 A

D) 2.40 A

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Answer:

Correct Answer: C

Solution:

  • For a transformer,

$ V_{p}I_{p}=V_{s}I_{s},\Rightarrow I_{S}=\frac{V_{p}I_{p}}{V_{s}}=\frac{4000\times 100}{240000}A $ =1.67A



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