Question

give two differences between gravitational and electrostatic forces

Answer 1

One major difference is in the strength of the forces. The gravitational attraction between two electrons is only 8.22*10−37 of the electrostatic force of repulsion at the same separation. However, gravitation usually is concerned with large masses, while any large collection of charges will quickly neutralize.

Another difference between the two forces is the fact that gravitation only attracts, while electrical forces attract when the electrical charges are opposite and repel if the charges are similar. Thus, gravitation is considered a monopole force, while electrostatics is a dipole force.

However, the concept of dark energy, which seems to have an anti-gravitation force, may allow for gravitation to be both the attraction and repulsion of matter.

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