MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
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Correct Answer: D. Ability of a material to regain original shape after deforming force is removed
Explanation:
Elastic deformation is reversible within the elastic limit.
Beyond that limit, permanent deformation may occur.
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Correct Answer: D. 0.12 m³/s
Explanation:
Volume flow rate is Q=Av.
Q=0.04×3 = 0.12 m³/s.
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Correct Answer: A. 400 J
Explanation:
Potential energy change is mgh.
5×10×8 = 400 J.
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Correct Answer: B. 200 W
Explanation:
Power is work divided by time.
P=600/3 = 200 W.
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Correct Answer: C. 20,000 J
Explanation:
Energy transferred is Pt.
1000×20 = 20,000 J.
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Correct Answer: D. 100 J
Explanation:
Net work equals the change in kinetic energy.
Kf=20+80 = 100 J.
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Correct Answer: A. 40 J
Explanation:
ΔK=½m(v²-u²).
With m=2, ΔK=49-9 = 40 J.
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Correct Answer: B. 24 kg·m/s
Explanation:
Momentum is p=mv.
P=6×4 = 24 kg·m/s.
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Correct Answer: C. The turning effect of a force about an axis
Explanation:
Torque depends on force, lever arm, and angle.
It is the rotational counterpart of force.
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Correct Answer: C. 18 N·s
Explanation:
Impulse equals change in momentum.
J=3(8-2)=18 N·s.
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Correct Answer: D. Perpendicular distance from the axis to the force's line of action
Explanation:
Torque magnitude equals force times perpendicular lever arm.
A larger moment arm produces greater turning effect.
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Correct Answer: D. 10 N·s
Explanation:
Impulse is FΔt for constant force.
50×0.2 = 10 N·s.
