The power is one kilowatt if work is done at the rate of:
Correct answer: A. 1000 Js-1
- A. 1000 Js-1
- B. 1000 J min-1
- C. 100 Js-1
- D. 1000 Jh-1
Explanation
Work done by a body in one second is known as power. P = 1kW = 1000 W 1000 Js-I = 1000 J work in one second
Last updated
About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.