Question

In the superhit film 'Raja Hindustani', Amir Khan greets his beloved by shaking hands. What kind of force do they exert?
A. Nuclear
B. Gravitational
C. Weak
D. Electromagnetic

Answer 1

To answer this question, we should have an idea about the kind of forces involved while shaking hands. Therefore, we need to know which type of force actually occurs during physical interaction.

Complete step-by-step answer:
Before we move on to the correct answer, we need to examine each of the mentioned options that are given.

So, let's first move on with nuclear force. The nuclear force is generated between nucleons with the help of the exchange of particles, which are also known as mesons. However, in the situation that is mentioned in the question, no such criteria occurred, which might lead to nucleon generation. So nuclear force cannot be generated, and this is not the correct answer.

Now, let's move on to gravitational force. We know that the force of gravity is exerted on any object by another when it is directly proportional to the product of those objects masses and is inversely proportional to the distance between those objects squared. But in the question, the situation that is mentioned fulfills no such criteria for the occurrence of gravitational force because, in this situation, the two individuals move towards each other on their own, and there is no force pulling them towards each other. Therefore, the gravitational force is not the correct answer.

By weak force, we mean that it is among the four strong forces that govern all the matters in the universe. The other three forces are gravity, electromagnetism, and the strong force. However, weak force interaction always occurs when there is some form of radioactivity, and there is an unstable subatomic particle to be governed. However, in the situation that is mentioned in the question, no such occurrence takes place there. Therefore weak force is not the correct answer.

However, in the last option, the electromagnetic force is a kind of force which is generated during physical interaction, and it occurs between two electrically charged particles. This resembles the situation that is mentioned in the question because the human body is considered to be a charged particle. So the correct answer to the problem mentioned is Option D.

Note: The main reason behind electromagnetic force to occur is because of the photon, and it is also responsible for the atomic structure, chemical reactions, and the other attractive and repulsive forces which are associated with the concept of electrical charge and magnetism.