The average power and instantaneous power become equal if work is done at __________________?
Correct answer: C. at uniform rate
- A. any rate
- B. at variable rate
- C. at uniform rate
- D. at high rate
Explanation
Average power is total work divided by total time, while instantaneous power is the rate of doing work at a particular instant. They are equal when work is done at a uniform rate, because the rate has the same value throughout. The likely wrong choice is b because variable-rate work generally makes instantaneous power change with time.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Power
Power is the rate at which work is done or energy is transferred, with average power calculated over a time interval and instantaneous power found from P = Fv when force and velocity are aligned. Work includes units, mechanical efficiency, and the distinction between power and total work or energy.
Practise Work and Energy
748 free Work and Energy MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Power questions
The consumption of energy by a 60 watt bulb in 2 sec is_________________?
The dimension of power is_______________?
The dot product of force and velocity is__________________?
Electrical energy is converted to heat at the rate of___________________?
Electrical energy is measured in___________________?
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?