- 1(current)
Q. No.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: Â Nuclear Energy |
From NCERT
PMT - 2011
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The statement which is incorrect about nuclear force between two protons is?
| 1. | These are always attractive forces. |
| 2. | These are non-central forces. |
| 3. | These are charge independent. |
| 4. | These are short-range forces. |
Subtopic: Â Nuclear Energy |
 61%
From NCERT
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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. \(F_{p p} \neq F_{n n} \neq F_{p n}\)
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: Â Nuclear Energy |
From NCERT
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For the nuclear reaction:
\({}_{92}^{235}\mathrm{U}+ {}_{0}^{1}\mathrm{n}\rightarrow {}_{56}^{144}\mathrm{Ba}+...+3{}_{0}^{1}\mathrm{n}\)
The blank space can be filled by:
\({}_{92}^{235}\mathrm{U}+ {}_{0}^{1}\mathrm{n}\rightarrow {}_{56}^{144}\mathrm{Ba}+...+3{}_{0}^{1}\mathrm{n}\)
The blank space can be filled by:
| 1. | \({}_{26}^{89}\mathrm{Kr}\) | 2. | \({}_{36}^{89}\mathrm{Kr}\) |
| 3. | \({}_{26}^{90}\mathrm{Sr}\) | 4. | \({}_{38}^{89}\mathrm{Sr}\) |
Subtopic: Â Nuclear Energy |
 88%
From NCERT
AIPMT - 1998
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Which of the following is used as a moderator in nuclear reactors?
1. Plutonium
2. Cadmium
3. Heavy water
4. Uranium
Subtopic: Â Nuclear Energy |
 80%
From NCERT
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Which of the following are suitable for the fusion process?
| 1. | light nuclei |
| 2. | heavy nuclei |
| 3. | the element must be lying in the middle of the periodic table |
| 4. | middle elements which are lying on the binding energy curve |
Subtopic: Â Nuclear Energy |
 80%
From NCERT
AIPMT - 2002
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Solar energy is due to:
| 1. | fusion reaction. | 2. | fission reaction. |
| 3. | combustion reaction. | 4. | chemical reaction. |
Subtopic: Â Nuclear Energy |
 67%
From NCERT
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Fusion reaction takes place at a higher temperature because:
| 1. | atoms get ionized at high temperatures. |
| 2. | kinetic energy is high enough to overcome the Coulomb repulsion between nuclei. |
| 3. | molecules break up at a high temperature. |
| 4. | nuclei break up at a high temperature. |
Subtopic: Â Nuclear Energy |
 82%
From NCERT
NEET - 2011
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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:
\({}_{1}^{2}\mathrm{H}+{}_{1}^{2}\mathrm{H}\rightarrow {}_{2}^{3}\mathrm{He}+ n + 3.27~\text{MeV}\)
\({}_{1}^{2}\mathrm{H}+{}_{1}^{2}\mathrm{H}\rightarrow {}_{2}^{3}\mathrm{He}+ n + 3.27~\text{MeV}\)
| 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. | \(3.9 \times 10^{4} \text { years }\) |
Subtopic: Â Nuclear Energy |
From NCERT
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If in nuclear reactor using \(\mathrm{U}^{235}\) as fuel, the power output is \(4.8\) MW, the number of fissions per second is:
(Energy released per fission of \(\mathrm{U}^{235}=200\) MeV watts, \(1~\text{eV}= 1.6\times 10^{-19}~\text{J})\)
(Energy released per fission of \(\mathrm{U}^{235}=200\) MeV watts, \(1~\text{eV}= 1.6\times 10^{-19}~\text{J})\)
| 1. | \(1.5\times 10^{17}\) | 2. | \(3\times 10^{19}\) |
| 3. | \(1.5\times 10^{25}\) | 4. | \(3\times 10^{25}\) |
Subtopic: Â Nuclear Energy |
 72%
From NCERT
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- 1(current)
Q. No.
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