1. So that they can operate at the same main voltage
2.So that they can be operated independently
johnmulu answered the question on February 20, 2017 at 05:29
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A house has one 100 W bulb, two 60 W bulbs and one 30 W bulb. Determine the cost of having all the bulbs switched on for 70 hours, given that the cost of electricity is 40 cents per kilowatt hour.
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Date posted: February 20, 2017. Answers (1)
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