What is the correct expression for power?

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Editor">Editor Staff asked 1 year ago

What is the correct expression for power?
 
(a) P = dW/dt
 
(b) P = F * d
 
(c) P = E
 
(d) P = dE/dt
 
I got this question during an online exam.
 
The query is from Introduction to Work, Energy and Power topic in chapter Work, Energy and Power of Physics – Class 11
Select the correct answer from above options 
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Editor">Editor Staff answered 1 year ago

Right answer is (a) P = dW/dt
 
Best explanation: Power is defined as the rate of change of work. Hence, P = dW/dt. Instantaneous power = Force x instantaneous speed. Average power = total work / total time.

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