In the nuclear decay given below:
the particles emitted in the sequence are:
1. | \(\beta, \alpha, \gamma \) | 2. | \(\gamma, \beta, \alpha \) |
3. | \(\beta, \gamma, \alpha \) | 4. | \(\alpha, \beta, \gamma\) |
If M (A, Z), , and denote the masses of the nucleus , proton, and neutron respectively in units of u (1 u = 931.5 MeV/c2) and BE represents its binding energy in MeV, then:
1. | \(M(A, Z)=Z_p+(A-Z) M_n-B E / c^2\) |
2. | \(\mathrm{M}(\mathrm{A}, \mathrm{Z})=\mathrm{ZM}_{\mathrm{p}}+(\mathrm{A}-\mathrm{Z}) \mathrm{M}_{\mathrm{n}}+\mathrm{BE}\) |
3. | \(M(A, Z)=Z_p+(A-Z) M_n-B E\) |
4. | \(\mathrm{M}(\mathrm{A}, \mathrm{Z})=\mathrm{ZM}_{\mathrm{p}}+(\mathrm{A}-\mathrm{Z}) \mathrm{M}_{\mathrm{n}}+\mathrm{BE} / \mathrm{c}^2\) |
The binding energy of deuteron is 2.2 MeV and that of is 28 MeV. If two deuterons are fused to form one then the energy released is:
1. | 25.8 MeV | 2. | 23.6 MeV |
3. | 19.2 MeV | 4. | 30.2 MeV |
The energy equivalent of \(0.5\) g of a substance is:
1. \(4.5\times10^{13}\) J
2. \(1.5\times10^{13}\) J
3. \(0.5\times10^{13}\) J
4. \(4.5\times10^{16}\) J
The mass of a nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of the nucleus is near:
1. 4.6 MeV
2. 5.6 MeV
3. 3.9 MeV
4. 23 MeV
A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in the fusion reaction is 0.02866 u. The energy liberated per nucleon is: (Given 1 u = 931 MeV)
1. | 26.7 MeV | 2. | 6.675 MeV |
3. | 13.35 MeV | 4. | 2.67 MeV |
The binding energies of the nuclei A and B are Ea and Eb respectively. If three atoms of the element B fuse to give one atom of element A and an energy Q is released, then Ea, Eb and Q are related as:
1. Ea – 3Eb = Q
2. 3Eb – Ea = Q
3. Ea + 3Eb = Q
4. Eb + 3Ea = Q
How long can an electric lamp of 100 W be kept glowing by fusion of 2.0 kg of deuterium? Take the fusion reaction as:
.
1. | \(4.9 \times 10^{4} \text { years }\) | 2. | \(2.8 \times 10^{4} \text { years }\) |
3. | \(3.0 \times 10^{4} \text { years }\) | 4. | \(3.9 \times 10^{4} \text { years }\) |
-particle consists of:
1. | 2 protons only |
2. | 2 protons and 2 neutrons only |
3. | 2 electrons, 2 protons, and 2 neutrons |
4. | 2 electrons and 4 protons only |
A nucleus with mass number 220 initially at rest emits an -particle. If the Q value of the reaction is 5.5 MeV, then the kinetic energy of -particle is:
1. 4.4 meV
2. 5.4 MeV
3. 5.6 MeV
4. 6.5 MeV