Escape velocity depends on: MCQ with Answer and Explanation

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Escape velocity depends on:

A. Planet mass and radius

B. Projectile mass

C. Launch angle

D. Atmosphere

Answer: Option A

Solution (By JKSSB Mock Tests)

v_e = √(2GM/R): depends on planet's M and R, independent of projectile mass or launch direction. Memory tip: 'v_e ∝ √(M/R); property of planet, not projectile'. Gravitation concept frequently tested in competitive exams.

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Question #1

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The amount of heat required to raise temperature of 1 g water by 1°C is

A. 4.2 J

B. 1 J

C. Both B and C

D. 1 cal

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Correct Answer: Option C

Explanation:
1 cal = 4.186 J ≈ 4.2 J. So both are correct. However option D covers both. I'll set D as correct.

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Question #2

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The centre of mass of a two-particle system lies on the line joining them, closer to

A. Lighter particle

B. Heavier particle

C. Depends on velocity

D. Midpoint always

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Correct Answer: Option B

Explanation:
r_cm = (m1 r1 + m2 r2)/(m1+m2). Closer to heavier mass.

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Question #3

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Which of the following is not a transverse wave?

A. Wave on a string

B. Light wave

C. Sound wave in air

D. Radio wave

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Correct Answer: Option C

Explanation:
Sound in air is longitudinal. Light, radio are EM waves, transverse. Wave on string transverse. Water waves combine transverse and longitudinal.

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