Free physics question bank
Power questions with solutions
Practice Work , Power and Energy for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 22 questions
- MCQeasyWork , Power and Energy
A pump of efficiency 80% lifts water at a rate of 20 kg/s through a vertical height of 10 m. Take g = 10 m/s². Required input power is:
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JEE MainsNEETJEE Advanced
Open question & full solution → - MCQmediumWork , Power and Energy
A body is moving unidirectionally under the influence of a constant power source. Its displacement in time t is proportional to :
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JEE Mains 2024 05 Apr Evening Shift
Open question & full solution → - MCQmediumWork , Power and Energy
An object of mass 1000 g experiences a time-dependent force F = (2t, 3t²) N. Assuming zero initial velocity, the instantaneous power generated by the force at time t is:
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JEE Mains 2025 7 April Morning Shift
Open question & full solution → - Multi-correcteasyWork , Power and Energy
A particle is acted upon by a force of constant magnitude F while its velocity has constant magnitude v. Which values can the instantaneous power of this force take as the angle between F and v changes?
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JEE MainsNEETJEE Advanced
Open question & full solution → - MCQeasyWork , Power and Energy
A particle has instantaneous velocity components v = (3, 4) m/s and is acted upon by a force with components F = (8, -6) N. The instantaneous power delivered by the force is:
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JEE MainsNEETJEE Advanced
Open question & full solution → - MCQmediumWork , Power and Energy
Two motors raise 300 kg of water in 5 minutes and 50 kg in 2 minutes respectively from a well 100 m deep. Their power ratio is 3√x/(√x+1). Find x.
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JEE Mains13 April 2023Shift 1Morning Shift
Open question & full solution → - IntegereasyWork , Power and Energy
A 5 kg block starts from rest and is pulled up a smooth 30° incline with acceleration 1 m s⁻². Find the power delivered by the pulling force at t = 10 s. Take g = 10 m s⁻². Image
JEE Mains11 April 2023Shift 2Evening Shift
Open question & full solution → - NumericmediumWork , Power and Energy
A 1000 kg car moves on a horizontal road at 20 m/s against a constant resistive force of 500 N. If the engine power is 30 kW, its instantaneous acceleration is N/20 m/s². Find N.
JEE MainsNEETJEE Advanced
Open question & full solution → - Multi-correctmediumWork , Power and Energy
A particle of mass m moves in one dimension under a constant positive power P supplied by the net force. It starts from rest. Which statements are correct?
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JEE MainsNEETJEE Advanced
Open question & full solution → - A/RmediumWork , Power and Energy
Evaluate the following statements.
Assertion
Assertion (A): For a car driven by an engine of constant power on a resistance-free horizontal road, acceleration decreases as speed increases.
Reason
Reason (R): At constant power, the driving force is inversely proportional to speed.
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JEE MainsNEETJEE Advanced
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