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joja [24]
3 years ago
11

Ask Your Teacher An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires

, each of which is 34.0 m long and has a resistance of 0.109 Ω per 300 m. (a) Find the potential difference at the customer's house for a load current of 116 A.
Physics
1 answer:
natta225 [31]3 years ago
4 0

Answer:

The potential difference at the customer's house is 117.1 V.

Explanation:

a) The potential difference at the customer's house can be calculated as follows:

\Delta V_{h} = \Delta V_{p} - \Delta V_{l}

<u>Where</u>:

V_{h}: is the potential difference at the customer's house

V_{p}: is the potential difference from the main power lines = 120 V

V_{l}: is the potential difference from the lines

\Delta V_{h} = \Delta V_{p} - IR

The resistance, R, is:

\frac{0.109 \Omega}{300 m}*2*34.0 m = 0.025 \Omega

Now, the potential difference at the customer's house is:

\Delta V_{h} = 120 V - 116A*0.025 \Omega = 117.1 V

Therefore, the potential difference at the customer's house is 117.1 V.

I hope it helps you!

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