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When hooked up to a 120 volt source, what is the resistance of a 60W light...

When hooked up to a 120 volt source, what is the resistance of a 60W light bulb? How many can be wired safely in parallel in a 15amp circuit?

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Answer #1

Given is:-

Source voltage V = 120 volts

Power of the Light bulb P=60 Watts

Now,

The Power is given by

by plugging all the values we get

Part-b

Current in each bulb is (because in parallel connection voltage across each are is same)

Total number of bulbs that can be safely wired in parallel 15 amp ckt is

Thus total number of bulbs = 30

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