GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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work done over time
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both
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energy over time
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neither
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Detailed explanation-1: -Power can be expressed as P = Work/Change in Time, instead of P = Change in Energy/Change in Time, because the change in energy is basically the work done.
Detailed explanation-2: -Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s).
Detailed explanation-3: -Work is the energy needed to apply a force to move an object a particular distance. Power is the rate at which that work is done.
Detailed explanation-4: -Electrical Energy = Power x Time. The total amount of electrical energy used depends on the total power used by all your electrical devices and the total time they are used in your home. One kilowatt hour is equal to 1000 watts of power used for one hour of time.
Detailed explanation-5: -Capacity to do a work is called energy. Efficiency of doing a work is called power. So, a work cannot be done without energy or without efficiency of doing a work. Thus, it can be said that work, energy and power are related to each other.