NEET Practice Questions (MCQs) with Answers & Solutions

In beta decay, a neutron in the nucleus is converted into a proton, an electron, and an antineutrino (or a proton is converted into a neutron, a positron, and a neutrino in beta-plus decay). Therefore, the particles emitted are an electron and a neutrino (or antineutrino).

The gravitational law (Newton's law of gravitation) and Coulomb's law (which describes the force between two charges) are both inverse square laws. This means that the force decreases proportionally to the square of the distance between the two objects or charges.

The electric force between objects is due to their electric charge. The fundamental property that causes an electric force is the presence of charge in the object.

The gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This relationship is described by Newton's Universal Law of Gravitation. Hence, mass is the property responsible for gravitational force.

$ { Strong nuclear force \over Electro magnatic force } = { 1 \over 10 ^ {-2 } } = 10 ^ 2 $

$ { Strong nuclear force \over Weak nuclear force} = { 1 \over 10 ^ {-13} } = 10 ^ {13} $

$ {Electronmagnetic force \over Gravational force} = {10 ^ {-2} \over 10 ^ {-38 } } = 10 ^ {36 } $

James Clerk Maxwell is credited with unifying electromagnetism and optics. Maxwell's equations demonstrated that electric and magnetic fields travel through space as waves moving at the speed of light. This showed that light is an electromagnetic wave, thus unifying electromagnetism and optics.

Sir Isaac Newton is known for unifying the terrestrial and celestial domains under a common law of gravitation. Newton's law of universal gravitation states that every mass attracts every other mass in the universe with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.