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Q70 (IAS/2013) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Atomic and nuclear physics Answer Verified

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?

Result
Your answer: —  Â·  Correct: A
Explanation

The four fundamental forces of nature are gravity, electromagnetism, the weak nuclear force, and the strong nuclear force. Gravity is actually the weakest of the four fundamental forces, despite having an infinite range. The strong nuclear force is the strongest, being approximately 100 times stronger than electromagnetism and significantly stronger than gravity. Electromagnetism acts only between particles that possess an electric charge. The weak nuclear force is responsible for particle transformations and specific types of radioactive decay, such as beta decay. Finally, the strong nuclear force acts at subatomic scales to bind protons and neutrons together within the nucleus, overcoming the electromagnetic repulsion between positively charged protons. Therefore, the statement claiming gravity is the strongest is incorrect.

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