Refer to JEE Physics Work Energy and Power MCQs Set C provided below available for download in Pdf. The MCQ Questions for Full Syllabus Physics with answers are aligned as per the latest syllabus and exam pattern suggested by JEE (Main), NCERT and KVS. Multiple Choice Questions for Work Energy and Power are an important part of exams for Full Syllabus Physics and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for JEE (Main) Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Work Energy and Power
Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Work Energy and Power in Full Syllabus.
Work Energy and Power MCQ Questions Full Syllabus Physics with Answers
Question: A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance d. The net work done in the process is
- a)
- b)
- c)
- d)
Answer:
Question: A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction? (g = 10 m/s2)
- a) 20 J
- b) 10 J
- c) 30 J
- d) 40 J
Answer: 20 J
Question: Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine? (g = 10 m/s2)
- a) 8.1 kW
- b) 7.0 kW
- c) 10.2 kW
- d) 12.3 kW
Answer: 8.1 kW
Question: One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio
- a) 1 : 2
- b) 1 : 3
- c) 2 : 1
- d) 3 : 1
Answer: 1 : 2
Question: A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude P0. The instantaneous velocity of this car is proportional to
- a) t1/2
- b) t1/3
- c) t1/4
- d) None of this
Answer: t1/2
Question: A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The power exerted by the gravitational force is greatest
- a) At the instant just before the body hits the earth
- b) It remains constant all through
- c) At the highest position of the body
- d) At the instant just after the body is projected
Answer: At the instant just before the body hits the earth
Question: If a force of 9 N is acting on a body, then find instantaneous power supplied to the body when its velocity is 5 m/s in the direction of force
- a) 45 watt
- b) 195 watt
- c) 75 watt
- d) 100 watt
Answer: 45 watt
Question: An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m. What is the power of the engine?
- a) 800 W
- b) 400 W
- c) 200 W
- d) 100 W
Answer: 800 W
Question: A particle of mass M starting from rest undergoes uniform acceleration. If the speed acquired in time T is V, the power delivered to the particle is
- a)
- b)
- c)
- d)
Answer:
Question: As shown in figure, a particle of mass m is performing vertical circular motion. The velocity of the particle is increased, then at which point will the string break?
- a) B
- b) A
- c) D
- d) C
Answer: B
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A stone is tied to a string of length ‘l’ and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time, the stone is at its lowest position and has a speed ‘u’. The magnitude of the change in velocity as it reaches a position where the string is horizontal (g being acceleration due to gravity) is
- a)
- b)
- c)
- d)
Answer:
Question: An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water?
- a) mv3
- b)
- c)
- d)
Answer: mv3
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c) x = 0
- d)
Answer:
Question:
- a)
- b)
- c) Same as that of B
- d) Opposite to that of B
Answer:
Question: The coefficient of restitution, e, for a perfectly elastic collision is
- a) 1
- b) –1
- c) 0
- d) None o this
Answer: 1
Question: A particle of mass m1 moves with velocity v1 and collides with another particle at rest of equal mass. The velocity of the second particle after the elastic collision is
- a) v1
- b) 2v1
- c) –v1
- d) None of this
Answer: v1
Question: Two identical balls A and B collide head-on elastically. If velocities of A and B, before the collision, are + 0.5 m/s and - 0.3 m/s respectively then their velocities, after the collision, are respectively
- a) – 0.3 m/s and + 0.5 m/s
- b) + 0.5 m/s and + 0.3 m/s
- c) – 0.5 m/s and + 0.3 m/s
- d) + 0.3 m/s and – 0.5 m/s
Answer: – 0.3 m/s and + 0.5 m/s
Question: A moving body of mass m and velocity 3 km/h collides with a rest body of mass 2m and sticks to it. Now the combined mass starts to move. What will be the combined velocity?
- a) 1 km/h
- b) 2 km/h
- c) 4 km/h
- d) 3 km/h
Answer: 1 km/h
More Questions.........................
Question: A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance d. The net work done in the process is
- a)
- b)
- c)
- d)
Answer:
Question: A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction? (g = 10 m/s2)
- a) 20 J
- b) 10 J
- c) 30 J
- d) 40 J
Answer: 20 J
Question: Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine? (g = 10 m/s2)
- a) 8.1 kW
- b) 7.0 kW
- c) 10.2 kW
- d) 12.3 kW
Answer: 8.1 kW
Question: One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio
- a) 1 : 2
- b) 1 : 3
- c) 2 : 1
- d) 3 : 1
Answer: 1 : 2
Question: A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude P0. The instantaneous velocity of this car is proportional to
- a) t1/2
- b) t1/3
- c) t1/4
- d) None of this
Answer: t1/2
Question: A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The power exerted by the gravitational force is greatest
- a) At the instant just before the body hits the earth
- b) It remains constant all through
- c) At the highest position of the body
- d) At the instant just after the body is projected
Answer: At the instant just before the body hits the earth
Question: If a force of 9 N is acting on a body, then find instantaneous power supplied to the body when its velocity is 5 m/s in the direction of force
- a) 45 watt
- b) 195 watt
- c) 75 watt
- d) 100 watt
Answer: 45 watt
Question: An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m. What is the power of the engine?
- a) 800 W
- b) 400 W
- c) 200 W
- d) 100 W
Answer: 800 W
Question: A particle of mass M starting from rest undergoes uniform acceleration. If the speed acquired in time T is V, the power delivered to the particle is
- a)
- b)
- c)
- d)
Answer:
Question: As shown in figure, a particle of mass m is performing vertical circular motion. The velocity of the particle is increased, then at which point will the string break?
- a) B
- b) A
- c) D
- d) C
Answer: B
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A stone is tied to a string of length ‘l’ and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time, the stone is at its lowest position and has a speed ‘u’. The magnitude of the change in velocity as it reaches a position where the string is horizontal (g being acceleration due to gravity) is
- a)
- b)
- c)
- d)
Answer:
Question: An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water?
- a) mv3
- b)
- c)
- d)
Answer: mv3
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c) x = 0
- d)
Answer:
Question:
- a)
- b)
- c) Same as that of B
- d) Opposite to that of B
Answer:
Question: The coefficient of restitution, e, for a perfectly elastic collision is
- a) 1
- b) –1
- c) 0
- d) None o this
Answer: 1
Question: A particle of mass m1 moves with velocity v1 and collides with another particle at rest of equal mass. The velocity of the second particle after the elastic collision is
- a) v1
- b) 2v1
- c) –v1
- d) None of this
Answer: v1
Question: Two identical balls A and B collide head-on elastically. If velocities of A and B, before the collision, are + 0.5 m/s and - 0.3 m/s respectively then their velocities, after the collision, are respectively
- a) – 0.3 m/s and + 0.5 m/s
- b) + 0.5 m/s and + 0.3 m/s
- c) – 0.5 m/s and + 0.3 m/s
- d) + 0.3 m/s and – 0.5 m/s
Answer: – 0.3 m/s and + 0.5 m/s
Question: A moving body of mass m and velocity 3 km/h collides with a rest body of mass 2m and sticks to it. Now the combined mass starts to move. What will be the combined velocity?
- a) 1 km/h
- b) 2 km/h
- c) 4 km/h
- d) 3 km/h
Answer: 1 km/h
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MCQs for Physics JEE (Main) Full Syllabus Work Energy and Power
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Work Energy and Power MCQs Physics JEE (Main) Full Syllabus
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Work Energy and Power JEE (Main) Full Syllabus MCQs Physics
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JEE (Main) MCQs Physics Full Syllabus Work Energy and Power
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