MCQ Collection
Physics MCQs
Practice Physics questions with answers and explanations.
Correct Answer: 24.62
Explanation:
Speed=distance/time=320/13=24.62 m/s.
Correct Answer: 25
Explanation:
Newton’s second law gives F=ma=5×5=25 N.
Correct Answer: 16
Explanation:
Newton’s second law gives F=ma=4×4=16 N.
Correct Answer: 48
Explanation:
K=½mv²=½×6×4²=48.0 J.
Correct Answer: 1.2
Explanation:
Ohm’s law gives I=V/R=6/5=1.200 A.
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Correct Answer: B. The electric field points in the direction a positive test charge would accelerate
Explanation:
Electric-field direction is defined by the force direction on a positive test charge.
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Correct Answer: C. A convex lens can converge parallel rays to a real focus
Explanation:
A convex lens is converging and brings parallel incident rays toward its principal focus.
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Correct Answer: D. The half-life is the time for the number of undecayed nuclei to fall to half its initial value
Explanation:
Half-life is a characteristic decay time at which the undecayed population becomes one half.
Correct Answer: 25
Explanation:
Speed=distance/time=300/12=25.00 m/s.
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Correct Answer: C. The half-life is the time for the number of undecayed nuclei to fall to half its initial value
Explanation:
Half-life is a characteristic decay time at which the undecayed population becomes one half.
Correct Answer: 25.45
Explanation:
Speed=distance/time=280/11=25.45 m/s.
Correct Answer: 9
Explanation:
Newton’s second law gives F=ma=3×3=9 N.
