There are four fundamental forces in the universe.
1. electromagnetic force.
2. gravitational force.
3. strong nuclear force.
4. weak nuclear force.
Q. The correct order of these forces from strongest to weakest is
  • a)
    2 3 4 1
  • b)
    2 1 3 4
  • c)
    1 3 4 2
  • d)
    3 1 4 2
Correct answer is option 'D'. Can you explain this answer?

UPSC Question

By Safwan Khan · 4 weeks ago ·UPSC
2 Answers
KANISHKA answered Jan 01, 2019
Gravitational force is the weakest among the fundamental forces. There are four fundamental forces (that we know of) in our universe: Strong Nuclear, Electromagnetic, Weak Nuclear and Gravitational. The strongest one is the Strong Nuclear force, which is responsible for keeping the nuclei of atoms together. About one hundred times weaker than the strong nuclear force is the electromagnetic one. This is the strongest force that we experience in our everyday lives. In fact, whenever we touch anything we experience the Electromagnetic force. The electrons in our skin repel electrons in whatever we touch through this force. The Weak Nuclear force is the one responsible for most decays of particles and nuclei – which is where radioactivity comes from. This force is about 10 billion times weaker than the Electromagnetic force. The weakest of all is the Gravitational force. In fact, Gravitational force is 10 thousand billion billion billion billion times weaker than the Electromagnetic force.

Adarsh Rajput answered Jun 24, 2019
Strong nuclear forces bind atoms... so to break an atom very much energy is needed and is also very short distance force approx of 10^-15 m or 1fm so it's strongest then Electromagnetic force which comes after, it can travel which is game of two charged particles instead two mass if we take any two or more charged particle... then.. Weak nuclear force is a force due to which radioactive decay is possible... and then gravity force between two or more masses.... That's all... 3142

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