Physics MCQs

852 MCQs  (Page 57 of 86)

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When a force is applied at one end of an elastic wire it produces at strain ∝ in the wire. If y is the youngs modulus of the material of the wire the amount of energy stored per unit volume of the wire is given by_________________?
A. Y∝
B. 2y∝
C. Y∝/2
D. Y∝2
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A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ?
A. 0.01j
B. 0.02j
C. 0.04j
D. 1.0j
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A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by_________________?
A. Stress/strain
B. (stress/strain)
C. Stress x strain
D. (stress / strain)
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The ration stress to strain in youngs modulus of the material then tension is__________________?
A. Directly proportional to extension
B. Directly proportional to strain
C. Directly proportional to square of amplitude
D. Inversely proportional to extension
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One mega watt hour is equal to_________________?
A. 36 x 106 j
B. 36 x 1012 j
C. 36 x 109 j
D. 36 x 108 j
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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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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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When two protons are brought together_____________________?
A. Kinetic energy increases
B. P.e. between them increases
C. P.e. between them decreases
D. P.e. between tem does not change
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A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ?
A. MAN does more work than child
B. Child does more work than MAN
C. Both do the same amount of work
D. It is a foolish question
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The area under the force displacement graph represents__________________?
A. Area
B. Work done
C. Power
D. None of these
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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