Question

Which of the following statements is correct regarding the universal gravitational constant G ?

• A. G has same value in all systems of units.
• B. The value of G is same everywhere in the universe.
• C. The value of G was first experimentally determined by Johannes Kepler.
• D. G is a vector quantity.

Answer 1

Answer: (B)

The value of G is same everywhere in the universe.

Answer 2

G has different value in different system of units. In SI system the value of G is $6.67 \times 10^{- 11}Nm^{2}Kg^{- 2}$whereas in CGS its values is $6.67 \times 10^{- 8}$dyne $cm^{2}g^{- 2}$. The value of G is same throughout the universe. The value of G was first experimentally determined by English scientist Henry Cavendish. G is a scalar quantity.