Question

The difference between a proton and neutrino is:
(A) The spin of photon is 1 and that of neutrino is $\dfrac{1}{2}$ in units of $\dfrac{h}{2 \pi}$
(B) The spin of photon is $\dfrac{1}{2}$ and that of neutrino is 1 in units of $\dfrac{h}{2 \pi}$
(C) Both have equal spin but neutrino is electromagnetic in nature
(D) Both have unequal spin but neutrino is electromagnetic in nature

Answer 1

Hint: We know that a neutrino is a subatomic particle that is very similar to an electron, but has no electrical charge and a very small mass, which might even be zero. Neutrinos are one of the most abundant particles in the universe. Because they have very little interaction with matter, however, they are incredibly difficult to detect. Millions of neutrinos coming from nuclear reactions in the Sun pass through our body every day without ill effects. The reason is that their interaction with human tissue is next to zero. All charged particles, like electrons, protons, etc do interact and in sufficient quantities can be harmful. Neutrinos are created by various radioactive decays; the following list is not exhaustive, but includes some of those processes: beta decay of atomic nuclei or hadrons, natural nuclear reactions such as those that take place in the core of a star.

Complete step by step answer
We know that the proton is an elementary particle that is identical with the nucleus of the hydrogen atom, that along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and that has a mass of $1.673\text{ }\times \text{ }{{10}^{-27}}$kilogram. The protons inside an atom's nucleus help bind the nucleus together. They also attract the negatively charged electrons, and keep them in orbit around the nucleus. The number of protons in an atom's nucleus determines which chemical element it is.
It can be said that protons are a type of subatomic particle with a positive charge. Protons are bound together in an atom's nucleus as a result of the strong nuclear force. Neutrons are a type of subatomic particle with no charge (they're neutral). As a result, a neutral atom must have an equal number of protons and electrons. A proton carries a positive charge (+) and an electron carries a negative charge (-), so the atoms of elements are neutral, all the positive charges cancelling out all the negative charges. Atoms differ from one another in the number of protons, neutrons and electrons they contain.
The spin of photons is 1 and that of neutrino is $\dfrac{1}{2}$ in units of $\dfrac{\mathrm{h}}{2 \pi}$.

Hence the correct answer is option B.

Note: It is known that a photon is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all light. Photons are always in motion and, in a vacuum, travel at a constant speed to all observers of $2.998\text{ }\times \text{ }{{10}^{8}}m/s$. This is commonly referred to as the speed of light, denoted by the letter c. In physics, a photon is a bundle of electromagnetic energy. It is the basic unit that makes up all light. The photon is sometimes referred to as a quantum of electromagnetic energy. Photons are not thought to be made up of smaller particles. For instance, if photons weigh nothing at all, they would be completely stable and could theoretically last forever. But if they do have a little mass, they could eventually decay into lighter particles. That lifetime may sound like an eternity, but to a photon traveling at light speed, it passes in a relative blink.