The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct? [2013]

The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

Gravity is the strongest of the four
Electromagnetism act only on particles with an electric charge
Weak nuclear force causes radioactivity
Strong nuclear force holds protons and neutrons inside the nucleus of an atom.

Explanation

Statement (a) is the correct answer

Actually, gravity is the weakest of the four fundamental forces. Ordered from strongest to weakest, the forces are 1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity.

Diagram comparing four fundamental forces in nature, detailing electromagnetic, weak nuclear, strong nuclear, and gravitational forces. It includes relative strength, range, particles acted on, and mediating particles, with illustrations like a battery for electromagnetic and an atom for strong nuclear force, highlighting gravitational force as weakest with infinite range.

Gravity is so weak that the hydrogen bonding in a single drop of water, which is one of the weakest forms of the electromagnetic force, can overpower the gravity of an entire planet.

Gravity is so weak that the hydrogen bonding in a single drop of water, which is one of the weakest forms of the electromagnetic force, can overpower the gravity of an entire planet.