The value of the universal gravitational constant G is approximately:
A6.67 × 10⁻¹¹ N m² kg⁻²
B9.81 m s⁻²
C6.02 × 10²³ mol⁻¹
D1.38 × 10⁻²³ J K⁻¹
Answer & Solution
Correct answer: A. 6.67 × 10⁻¹¹ N m² kg⁻²
1. G ≈ 6.674 × 10⁻¹¹ N m² kg⁻².
2. The distractor 9.81 is acceleration due to gravity g (local, near Earth's surface).
3. The other distractors are Avogadro's number and Boltzmann's constant.
_Source: NCERT Class 11 Physics Ch 7 "Gravitation", §7.4 Gravitational Constant, p. 131_
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