Use the worked example above to help you solve this problem. A circuit provides

Question

Use the worked example above to help you solve this problem. A circuit provides a maximum current of 23.1 A at an operating voltage of 1.20 Times 102 V. How many 75 W bulbs can operate with this voltage source? At $0,140 per kilowatt-hour, how much does it cost to operate these bulbs for 6.00 h? How many Christmas tree lights drawing 5.00 W of power each could be run on a circuit operating at 1.20 Times 102 V and providing 18.5 A of current? lights Find the cost to operate one such string 24.0 h per day for the Christmas season (two weeks), using the rate $0.14/kWh.

Explanation / Answer

you have asked 2 questions.As per guidelines i can answer only one.Please raise different question for other one

I=23.1 amp

V=120V

P=VI

=23.1*120

=2772 watt

so with this volatge you can run app

2772/75

=36.96 bulbs

=40 approx--answer a

b)so P=2772 watt

or P=2.72kwatt

so for 6 hours power used will be

2.72*6 hr

=16.32 kwatt hr

now cost for running 16.32 watt hr will be

(16.32*1000/1000)*0.140

=$2.28

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