The value of universal gravitational constant G is MCQ with Answer and Explanation

The value of universal gravitational constant G is

A. 9.8 m/s²

B. Both A and C

C. 6.67 × 10⁻¹¹ N m²/kg²

D. 6.67 × 10⁻¹¹ dyne cm²/g²

Answer: Option B

Solution (By JKExamLibrary)

G = 6.67 × 10⁻¹¹ N m²/kg² in SI, and 6.67 × 10⁻⁸ dyne cm²/g² in CGS. Both are correct. Important constant, measured by Cavendish. g is acceleration due to gravity, different.

This question belongs to: Science Physics

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1 Report Error

The moment of inertia of a thin rod of mass M and length L about an axis through its centre and perpendicular to length is

A. ML²/2

B. ML²

C. ML²/3

D. ML²/12

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
I_center = ML²/12. About end = ML²/3.

This question belongs to: Science Physics

Question #2 Report Error

A block of mass 5 kg is pushed against a wall with a horizontal force of 50 N. Coefficient of friction 0.4. The block (g=10)

A. Falls down

B. Moves up

C. Moves sideways

D. Stays at rest

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
Weight = 50 N. Max static friction = μN = 0.4×50 = 20 N, insufficient to hold. So block slides down.

This question belongs to: Science Physics

Question #3 Report Error

The speed of sound in air at 0°C is 331 m/s. At 22°C, approximately

A. 360 m/s

B. 331 m/s

C. 350 m/s

D. 343 m/s

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
v ≈ 331 + 0.6×T(°C) = 331 + 0.6×22 = 331+13.2 = 344.2 m/s, nearest 343 m/s.

This question belongs to: Science Physics

Explore All Physics MCQs