India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th five-Year Plan. In this context, consider the following statements: 1. Neutrinos are chargeless elementary particles that travel close to the

examrobotsa's picture

Submitted by examrobotsa on

Q: 34 (IAS/2010)
India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th five-Year Plan. In this context, consider the following statements:
1. Neutrinos are chargeless elementary particles that travel close to the speed of light.
2. Neutrinos are created in nuclear reactions of beta decay.
3. Neutrinos have a negligible, but nonzero mass.
4. Trillions of Neutrinos pass through human body every second.
Which of the statements given above are correct ?

question_subject: 

Science

question_exam: 

IAS

stats: 

0,76,41,9,19,13,76

keywords: 

{'neutrinos': [0, 0, 1, 0], 'neutrino observatory': [0, 0, 0, 1], 'beta decay': [0, 0, 1, 0], 'chargeless elementary particles': [0, 0, 1, 0], 'nuclear reactions': [0, 0, 1, 0], 'nonzero mass': [0, 0, 1, 0], 'mega science project': [0, 0, 1, 0], 'trillions': [0, 0, 1, 0]}

All the statements given in the question are correct.

1. Neutrinos are chargeless elementary particles that travel close to the speed of light: Neutrinos are subatomic particles that are similar to electrons, but they don`t carry an electric charge. They travel very close to the speed of light and have a very small mass. They are one of the most abundant particles in the universe.

2. Neutrinos are created in nuclear reactions of beta decay: Neutrinos are produced in many types of nuclear reactions, including beta decay. In beta decay, a neutron inside an atomic nucleus changes into a proton, and a high-energy electron and a neutrino are emitted.

3. Neutrinos have a negligible, but nonzero mass: For many years, it was believed that neutrinos were completely massless. However, in the late 1990s, experiments demonstrated that neutrinos do indeed have a small mass, although it is much smaller than the mass of any other known subatomic particle.

4. Trillions of Neutrinos pass through human body every second: Neutrinos are so abundant that trillions of them pass through our bodies every second, but they interact so weakly with matter that they rarely interact with atoms in our bodies or anything else.