Work and Energy 11 Class Physics MCQs


FSC Physics MCQs Part 1 Physics Part 2 HSSC Pre Medical Pre Engineering text Book Questions first year and second-year Physics mcqs

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[question]
A field in which the work done in a moving a body along closed path is zero is called
A. electric field B. conservative field
C. electromagnetic field D. gravitational field
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[explanation]B[/explanation]
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[question]
Which of the following types of force can do no work on the particle on which it acts?
A. frictional force B. gravitational force
C. elastic force D. centripetal force
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[explanation]D[/explanation]
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[question]
The average power and instantaneous power become equal if work is done at
A. any rate B. at variable rate
C. at uniform rate D. at high rate
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[explanation]C[/explanation]
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[question]
Proton electron neutron and a particles have same momentum. Which of them have highest K.E?
A. Proton B. electron
C. neutron D. a-particle
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[explanation]B[/explanation]
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[question]
The escape velocity of a body in gravitational field of earth is independent of
A. its mass B. the angle at which it is thrown
C. both its mass and the angle at which it is thrown D. gravitational field of earth
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[explanation]C[/explanation]
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[question]
The source of geothermal energy is
A. decay of radioactive element in the earth B. compression of material in the earth
C. residual lost of the earth D. all as said in a – b and c
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[explanation]D[/explanation]
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[question]
Work done by the force of friction is
A. always positive B. always negative
C. positive only for small frictional force D. positive only for large frictional force
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[explanation]B[/explanation]
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[quiz]
[question]
If velocity is doubled then
A. momentum increases 4 times and K.E increases 2 times B. momentum and K.E. remain same
C. momentum increases 2 times and K.E increases constant D. momentum increases 2 times and K.E increases 4 time
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[explanation]D[/explanation]
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[question]
Work has the dimension as that of same as that of
A. torque B. angular momentum
C. linear momentum D. power
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[explanation]A[/explanation]
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[quiz]
[question]
The relation between the escape velocity V esc and orbital speed Vo is given by
A. V esc = 1/2Vo B. V esc = ?2 Vo
C. V esc = Vo D. V esc = 2Vo
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[explanation]B[/explanation]
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