A) Electrostatic force
B) Nuclear force
C) Electromagnetic force
D) Gravitational force
Correct Answer: D
Solution :
The gravitational force of attraction between two objects is given by \[F=\frac{G\,\,{{m}_{1}}{{m}_{2}}}{{{r}^{2}}}\]where G the gravitational constant is equal to\[6.67\times {{10}^{-11}}N{{m}^{2}}\,k{{g}^{-2}}\]. Compared to electrostatic, nuclear and electromagnetic, gravitational force is the weakest. Infact gravitational force is times \[{{10}^{-43}}\] the electrical force.
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