NEET Practice Questions (MCQs) with Answers & Solutions

ECG stands for Electrocardiograph. It is a medical device used for recording the electrical activity of the heart over a period of time, which helps in diagnosing various heart conditions.

ESR stands for Electron Spin Resonance. It is a technique used to study materials with unpaired electrons, providing information about the electronic structure of the samples.

NMR stands for Nuclear Magnetic Resonance. It is a physical phenomenon in which nuclei in a strong magnetic field are perturbed by a weak oscillating magnetic field and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus. This technique is widely used in chemistry and medical imaging.

Electrodynamics is the branch of physics that deals with the study of electric charges in motion and the magnetic fields they produce. This includes phenomena such as electric currents, electromagnetic fields, and electromagnetic waves. It is a fundamental aspect of both classical and modern physics.

At present, there are four fundamental forces in nature: gravitational force, electromagnetic force, strong nuclear force, and weak nuclear force. These forces govern the interactions of matter and energy in the universe.

The force described in the question is the gravitational force. It is the force of mutual attraction between any two objects by virtue of their masses. This is a fundamental force described by Newton's law of universal gravitation.

The strongest of all fundamental forces is the nuclear force, also known as the strong nuclear force. It is responsible for holding the nuclei of atoms together and is much stronger than the other fundamental forces.

Electromagnetic force can be both attractive and repulsive. This force acts between charged particles: like charges repel each other, and opposite charges attract each other.

The force that binds particles in the nucleons (protons and neutrons) is the strong force, also known as the strong nuclear force. This is one of the four fundamental forces of nature and is responsible for holding the nuclei of atoms together. It is much stronger than the electromagnetic force, although it acts over a very short range.