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If the nuclear force between two protons, two neutrons and between a proton and a neutron is denoted by \(F_{pp} ,F_{nn}\) and \(F_{pn}\) respectively, then:
1. \(F_{p p} \approx F_{n n} \approx F_{p n}\)
2. \(F_{p p} \neq F_{n n}\) and \(F_{p n} = F_{n n}\)
3. \(F_{p p} = F_{n n} = F_{p n}\)
4. \(F_{p p} \neq F_{n n} \neq F_{p n}\)
Subtopic: Nuclear Energy |
Level 3: 35%-60%
Hints
The stable nucleus that has a radius half of the radius of \(\mathrm{Fe}^{56}\) is:
1. \(\mathrm{Li}^7\)
2. \(\mathrm{Na}^{21}\)
3. \(\mathrm{S}^{16}\)
4. \(\mathrm{Ca}^{40}\)
1. \(\mathrm{Li}^7\)
2. \(\mathrm{Na}^{21}\)
3. \(\mathrm{S}^{16}\)
4. \(\mathrm{Ca}^{40}\)
Subtopic: Nucleus |
68%
Level 2: 60%+
Hints
Which of the following is used as a moderator in nuclear reactors?
1. Plutonium
2. Cadmium
3. Heavy water
4. Uranium
Subtopic: Nuclear Energy |
79%
Level 2: 60%+
Hints
The binding energy per nucleon of deuterium and helium atom is \(1.1\) MeV and \(7.0\) MeV. If two deuterium nuclei fuse to form a helium atom, the energy released is:
1. \(19.2\) MeV
2. \(23.6\) MeV
3. \(26.9\) MeV
4. \(13.9\) MeV
1. \(19.2\) MeV
2. \(23.6\) MeV
3. \(26.9\) MeV
4. \(13.9\) MeV
Subtopic: Nuclear Binding Energy |
77%
Level 2: 60%+
PMT - 2001
Hints
In a fission reaction,
\(^{236}_{92}\mathrm{U}\rightarrow ~^{117}\mathrm{X}~+~^{117}\mathrm{Y}~+~^1_0n~+~^1_0n,\) the binding energy per nucleon of \(\mathrm{X}\) and \(\mathrm{Y}\) is \(8.5\) MeV whereas that of \(^{236}\mathrm{U}\) is \(7.6\) MeV. The total energy liberated will be about:
1. \(2000\) MeV
2. \(200\) MeV
3. \(2\) MeV
4. \(1\) keV
\(^{236}_{92}\mathrm{U}\rightarrow ~^{117}\mathrm{X}~+~^{117}\mathrm{Y}~+~^1_0n~+~^1_0n,\) the binding energy per nucleon of \(\mathrm{X}\) and \(\mathrm{Y}\) is \(8.5\) MeV whereas that of \(^{236}\mathrm{U}\) is \(7.6\) MeV. The total energy liberated will be about:
1. \(2000\) MeV
2. \(200\) MeV
3. \(2\) MeV
4. \(1\) keV
Subtopic: Nuclear Binding Energy |
79%
Level 2: 60%+
Hints
A nuclear reaction along with the masses of the particle taking part in it is as follows;
\(~~~~A ~~~~+~~~~~ B~~~~~ \rightarrow~~~~C ~~+~~~~ D~~~+~ ~Q~ ~\text{MeV}\\ \small{1.002~\text u~~~~~~~~ 1.004~\text u ~~~~~~~~~~~1.001~\text u~~~~~~1.003~\text u}\)
The energy \(Q\) liberated in the reaction is:
1. \(1.234~\text{MeV}\)
2. \(0.931~\text{MeV}\)
3. \(0.465~\text{MeV}\)
4. \(1.862~\text{MeV}\)
\(~~~~A ~~~~+~~~~~ B~~~~~ \rightarrow~~~~C ~~+~~~~ D~~~+~ ~Q~ ~\text{MeV}\\ \small{1.002~\text u~~~~~~~~ 1.004~\text u ~~~~~~~~~~~1.001~\text u~~~~~~1.003~\text u}\)
The energy \(Q\) liberated in the reaction is:
1. \(1.234~\text{MeV}\)
2. \(0.931~\text{MeV}\)
3. \(0.465~\text{MeV}\)
4. \(1.862~\text{MeV}\)
Subtopic: Mass-Energy Equivalent |
78%
Level 2: 60%+
Hints
When a deuterium is bombarded on \({}_{8}^{16}\mathrm{O}\) nucleus, an \(\alpha\text-\)particle is emitted, then the product nucleus is:
| 1. | \({}_{7}^{13}\mathrm{N}\) | 2. | \({}_{5}^{10}\mathrm{B}\) |
| 3. | \({}_{4}^{9}\mathrm{Be}\) | 4. | \({}_{7}^{14}\mathrm{N}\) |
Subtopic: Types of Decay |
78%
Level 2: 60%+
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The mass of \({}_{7}^{15}\mathrm{N}\) is \(15.00011\) amu, mass of \({}_{8}^{16}\mathrm{O}\) is \(15.99492\) amu and \(m_p = 1.00783\) amu. Determine the binding energy of the last proton of \({ }_{8}^{16}\mathrm{O}\).
1. \(2.13\) MeV
2. \(0.13\) MeV
3. \(10\) MeV
4. \(12.13\) MeV
Subtopic: Nuclear Binding Energy |
53%
Level 3: 35%-60%
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The power obtained in a reactor using \(\mathrm{U}^{235}\) disintegration is \(1000\) kW. The mass decay of \(\mathrm{U}^{235}\) per hour is:
1. \(1\) microgram
2. \(10\) microgram
3. \(20\) microgram
4. \(40\) microgram
Subtopic: Nuclear Energy |
51%
Level 3: 35%-60%
PMT - 2011
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In the nuclear reaction: \(\mathrm{X}\left(n,\alpha\right){}_{3}^{7}\mathrm{Li}\) the term \({X}\) will be:
| 1. | \({}_{5}^{10}\mathrm{B}\) | 2. | \({}_{5}^{9}\mathrm{B}\) |
| 3. | \({}_{5}^{11}\mathrm{B}\) | 4. | \({}_{2}^{4}\mathrm{He}\) |
Subtopic: Types of Decay |
Level 3: 35%-60%
PMT - 2001
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