Practice Library
All MCQs
Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
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Correct Answer: C. Newton’s third law
Explanation:
Action–reaction pairs are described by Newton’s third law.
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Correct Answer: C. increases
Explanation:
Kinetic energy increases with speed.
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Correct Answer: A. 3 × 10⁸ m/s
Explanation:
The speed of light is about 3 × 10⁸ m/s.
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Correct Answer: B. the same through all components
Explanation:
Current is the same throughout a series circuit.
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Correct Answer: B. Joule
Explanation:
Work is measured in joules.
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Correct Answer: B. 5 Pa
Explanation:
Pressure = force ÷ area = 10 ÷ 2 = 5 Pa.
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Correct Answer: C. 3
Explanation:
10³ = 1000, so log₁₀(1000) = 3.
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Correct Answer: B. y = 3x + 2
Explanation:
Gradient 3 and intercept 2 gives y = 3x + 2.
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Correct Answer: C. 7
Explanation:
x = ±7; the principal root in this option set is 7.
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Correct Answer: A. x² + C
Explanation:
∫2x dx = x² + C.
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Correct Answer: B. 2x
Explanation:
The derivative of x² is 2x.
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Correct Answer: C. 11
Explanation:
2(4) + 3 = 11.
