Which rays contain (+ve) charged particle:
1. α-rays
2. β-rays
3. γ-rays
4. X-rays
represent the mass of the neutron and proton respectively. An element having mass M has N neutrons and Z-protons, then the correct relation will be:
1.
2.
3.
4.
The energy released in nuclear fission is due to:
1. | some mass is converted into energy |
2. | the total binding energy of fragments is more than the B.E. of the parental element |
3. | total B.E. of fragments is less than the B.E. of parental element |
4. | total B.E. of fragments is equal to the B.E. of parental element |
Solar energy is mainly caused due to:
1. | burning of hydrogen in the oxygen |
2. | fission of uranium present in the sun |
3. | fusion of protons during synthesis of heavier elements |
4. | gravitational contraction |
The volume occupied by an atom is greater than the volume of the nucleus by a factor of about:
1. \(10\)
2. \(10^5\)
3. \(10^{10}\)
4. \(10^{15}\)
Which of the following rays are not electromagnetic waves?
1. X-rays
2. γ-rays
3. β-rays
4. Heat rays
The mass of a proton is 1.0073 u and that of a neutron is 1.0087 u (u = atomic mass unit). The binding energy of is: (Given: helium nucleus mass ≈ 4.0015 u)
1. | 0.0305 J | 2. | 0.0305 erg |
3. | 28.4 MeV | 4. | 0.061 u |
The mass number of a nucleus is:
1. | always less than its atomic number. |
2. | always more than its atomic number. |
3. | sometimes equal to its atomic number. |
4. | sometimes less than and sometimes more than its atomic number. |
A nuclear reaction is given by
represents:
1. β-decay
2. γ-decay
3. fusion
4. fission