Which is the strongest fundamental force acting between microscopic particles?

A. Strong force
B. Weak force
C. Gravity
D. Electromagnetic Force

I think it's either A or D, but I'm not sure which.

Gravity is the weakest of the 4 fources and plays essentially no role in attraction between microscopic particles.

One could eliminate the weak force based on its name (as long as one remembers that it is still stronger than gravity).

That leaves the strong force and the electromagnetic force. How does one choose between them?

Think about the nucleus of an atom. The only electrically charnged particles are protons, which repel each other. Therefore, the nucleus "should" blow apart. But the strong force acting between nucleons holds it together. Since one force would have the nucleus blow apart, and the other would hold it together, and the nucleus does hold together, then which one should be the stronger force?

The particles have to be smaller than what I would call microscopic, on the order of the size of a proton or neutron.

To determine the strongest fundamental force acting between microscopic particles, let's examine the options provided:

A. Strong force: The strong force, also known as the strong nuclear force, is experienced between particles called quarks inside atomic nuclei. It is responsible for holding the nucleus together. However, the strong force operates over a very short range and is not the strongest force among the options given.

B. Weak force: The weak force, or weak nuclear force, is responsible for certain types of radioactive decay. It plays a crucial role in processes like beta decay. While the weak force is indeed fundamental, it is not the strongest among the options provided.

C. Gravity: Gravity is a fundamental force that acts between all objects with mass or energy. While it is the force we are most familiar with in our daily lives due to its influence on large-scale objects like planets, it is actually the weakest of the four fundamental forces.

D. Electromagnetic Force: The electromagnetic force is the force of attraction or repulsion between electrically charged particles. It governs the behavior of charged particles and is responsible for phenomena such as electricity, magnetism, and light. It is significantly stronger than both the strong and weak nuclear forces and is stronger than gravity as well.

Therefore, the correct answer is D. The electromagnetic force is the strongest fundamental force acting between microscopic particles.