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3 years ago

11

If 65 kW is to be transmitted over two 0.100 ohm lines, estimate how much power is saved if the voltage is stepped up from 120 V

to 1200 V

1 answer:

MAXImum [283]3 years ago

3 0

Answer: 5.91kw

Explanation:

given data:

power = 65kw

voltage stepped up = 120v t0 1200

R 0.100

<u>Solution:</u>

when the it is stepped to 120v

$P = VI \\65000/ 120I\\ I = 541.7A\\$

power loss

$(I^{2} )R*2\\= (541.7^{2})0.100*2\\= 58536.2w$

when it is stepped to 1200v

$\frac{65000}{1200} \\ I = 54.17A\$

$(I^{2} )R*2\\= (54.17^{2})0.100*2\\= 586.9w$

total power saved

$= 65kw - 58.5kw - 0.59kw\\= 5.91kw$

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Explanation:

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