Preparing for the Joint Entrance Exam (JEE) can be a daunting task. With so many subjects to cover and so many topics to study, it can be challenging to know where to start. One essential topic in the JEE Mains syllabus is the Work, Energy and Power. In this article, we will provide 50+ MCQ questions on the Work, Energy and Power, along with detailed solutions to help you prepare for the JEE Mains exam.
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These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Work, Energy and Power JEE Mains MCQ Questions with Answers.
Work, Energy and Power JEE Mains MCQ
Work done by a force on an object is defined as the product of:
(a) Force and displacement
(b) Force and velocity
(c) Mass and acceleration
(d) Power and time
The SI unit of work is:
(a) Joule
(b) Newton
(c) Watt
(d) Pascal
The work-energy theorem states that the work done on an object is equal to:
(a) Its displacement
(b) Its final velocity
(c) Its change in kinetic energy
(d) Its mass
The energy possessed by a body due to its motion is called:
(a) Potential energy
(b) Kinetic energy
(c) Mechanical energy
(d) Elastic energy
The potential energy of an object near the surface of the Earth is given by the equation:
(a) PE = mgh
(b) PE = 1/2mv^2
(c) PE = Fd
(d) PE = Pt
The work done by a conservative force is independent of the:
(a) Path followed
(b) Displacement
(c) Force applied
(d) Initial velocity
The rate at which work is done is called:
(a) Power
(b) Energy
(c) Force
(d) Acceleration
The SI unit of power is:
(a) Joule
(b) Newton
(c) Watt
(d) Pascal
Power is defined as the:
(a) Force applied
(b) Rate of change of velocity
(c) Rate of doing work
(d) Acceleration produced
The work done by a force acting on an object is zero when:
(a) The force and displacement are perpendicular
(b) The force and displacement are parallel
(c) The force and displacement are in opposite directions
(d) The force and displacement are in the same direction
The work done by the force of gravity on a body moving horizontally is:
(a) Positive
(b) Negative
(c) Zero
(d) Cannot be determined without more information
The work done by a force on an object is negative when:
(a) The force and displacement are in the same direction
(b) The force and displacement are in opposite directions
(c) The force is applied perpendicular to the displacement
(d) The force is applied parallel to the displacement
The work done by a spring force is given by the equation:
(a) W = kx
(b) W = 1/2kx^2
(c) W = Fd
(d) W = mg
The work-energy theorem can be expressed as:
(a) W = Fd
(b) W = mgh
(c) W = 1/2mv^2
(d) W = Pt
The conservation of mechanical energy applies to systems where only __ forces are involved.
(a) Conservative
(b) Non-conservative
(c) Frictional
(d) External
The law of conservation of energy states that:
(a) Energy cannot be created
(b) Energy cannot be destroyed
(c) Energy is constant in a closed system
(d) All of the above
The efficiency of a machine is defined as:
(a) Output work/input work × 100%
(b) Input work/output work × 100%
(c) Output work/input work
(d) Input work/output work
A person carrying a load up a staircase does more work than when carrying the same load horizontally because:
(a) The displacement is greater
(b) The force is greater
(c) The time taken is longer
(d) The power expended is higher
The principle of conservation of mechanical energy states that in the absence of external forces, the total mechanical energy of a system remains:
(a) Constant
(b) Increasing
(c) Decreasing
(d) Zero
A ball is dropped from a certain height. At the highest point of its trajectory, its kinetic energy is:
(a) Maximum
(b) Minimum
(c) Zero
(d) Cannot be determined without more information
The work done against gravity when lifting an object vertically is equal to:
(a) The change in potential energy of the object
(b) The change in kinetic energy of the object
(c) The sum of the object’s potential and kinetic energies
(d) None of the above
The work done by a force on an object is defined as the product of:
(a) Force and velocity
(b) Force and displacement
(c) Mass and acceleration
(d) Power and time
The work done by a constant force on an object is given by the equation:
(a) W = Fd
(b) W = Fv
(c) W = ma
(d) W = Pt
The energy possessed by an object due to its motion is called:
(a) Potential energy
(b) Kinetic energy
(c) Mechanical energy
(d) Thermal energy
The potential energy of an object near the surface of the Earth is given by the equation:
(a) PE = mgh
(b) PE = 1/2mv^2
(c) PE = Fd
(d) PE = Pt
The work-energy theorem states that the work done on an object is equal to:
(a) Its displacement
(b) Its final velocity
(c) Its change in kinetic energy
(d) Its mass
Power is defined as the:
(a) Force applied
(b) Rate of change of velocity
(c) Rate of doing work
(d) Acceleration produced
The SI unit of power is:
(a) Joule
(b) Newton
(c) Watt
(d) Pascal
The power developed by a machine is 500 W. If the machine does 50 J of work in 5 seconds, the machine’s efficiency is:
(a) 50%
(b) 60%
(c) 70%
(d) 80%
A person carries a 20 kg box up a flight of stairs that is 5 meters high in 10 seconds. The power expended by the person is:
(a) 10 W
(b) 20 W
(c) 50 W
(d) 100 W
The efficiency of a machine is defined as the ratio of:
(a) Output power to input power
(b) Output work to input work
(c) Output energy to input energy
(d) Output time to input time
We hope there JEE MCQ of Class 11 Work, Energy and Power will help you to score an excellent rank in JEE Mains and Advanced. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
