Problem 21.77 Part B Constants Calculate the power input. Express your answer us

Question

Problem 21.77 Part B Constants Calculate the power input. Express your answer using two significant figures. A pair of power transmission lines each have a 0.80 resistance and carry 890 A over 14 krn. If the rms input voltage is 37 kV An = 3.2-10 Submit Previous Answers Request Answer x Incorrect; Try Again; 5 attempts remaining Part C Calculate power loss in the lines Express your answer using two significant figures. Hoess = 16.3 . 105 Submit Previous Answers Request Answer x Incorrect; Try Again; 4 attempts remaining Part D Calculate the power output. Express your answer using two significant figures. Pout Submit Request Answer

Explanation / Answer

a)

Vinmax = Vin sqrt(2) = 37 sqrt(2) = 52.32 Volts

i = current = 890 A

Input power is given as

Pin = i Vinmax = (890) (52.32) = 4.7 x 104 Watt

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