Question

An electric bulb is marked 60W.How much energy will it consume in 1 second and if used for 1 hour ?

Answer 1

Answer:

Explanation:

power is measured in watts, so the answer is 60 Watts. (the 1 second is extraneous information).

If you want to know about power expended over time, that is called energy and is measured in kWh.

For one Hours use, it is 60 W x 1 hr = 60 Wh = .060 kWh.

The cost at 10 cents per kWh would be $.006, that is 6 tenths of a cent.

In the case 1 second’s use is 1/3600 of an hour, 60W is .060 kW

So the energy consumed to light a 60W bulb for 1 second is .060 x 1/3600 =.00001666 kWh