MCQ Collection
PIEAS Physics MCQs
Practice PIEAS Physics questions with answers and explanations.
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Correct Answer: D. Total distance divided by total time
Explanation:
Average speed uses total path length.
It does not depend on direction.
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Correct Answer: A. Total displacement divided by total time
Explanation:
Average velocity is a vector based on net displacement.
A round trip can have zero average velocity.
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Correct Answer: B. Velocity
Explanation:
Slope gives change in displacement per unit time.
That is the definition of velocity.
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Correct Answer: C. 5
Explanation:
The y-component is A sinθ.
10 sin30° = 10×0.5 = 5.
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Correct Answer: D. 19 N
Explanation:
Vectors in the same direction add directly.
The resultant is 12+7 = 19 N.
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Correct Answer: A. 5 N
Explanation:
Opposite collinear vectors subtract in magnitude.
The resultant magnitude is |12-7| = 5 N.
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Correct Answer: B. Closeness of a measurement to the accepted value
Explanation:
Accuracy describes agreement with the true or accepted value.
Systematic error can reduce accuracy.
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Correct Answer: B. The directed change in position
Explanation:
Displacement is a vector from initial to final position.
It can be zero even when distance traveled is not zero.
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Correct Answer: C. An error that shifts measurements consistently in one direction
Explanation:
Systematic errors often arise from calibration or method bias.
Repeated measurements do not automatically remove them.
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Correct Answer: C. The total path length traveled
Explanation:
Distance is a scalar and depends on the actual path.
It is always nonnegative.
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Correct Answer: D. An unpredictable variation among repeated measurements
Explanation:
Random errors cause scatter around a central value.
Repeated measurements and averaging can reduce their effect.
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Correct Answer: A. 3
Explanation:
Leading zeros are not significant, but trailing zeros after a decimal are.
Thus 4, 5, and the final zero are significant.