For the nuclear reaction:
The blank space can be filled by:
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2.
3.
4.
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. |
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 |
If in nuclear reactor using U235 as fuel, the power output is 4.8 MW, the number of fissions per second is:
(Energy released per fission of U235 = 200 MeV watts, 1 eV = 1.6 X 10–19 J)
1. 1.5×1017
2. 3×1019
3. 1.5×1025
4. 3×1025
Solar energy is due to:
1. fusion reaction.
2. fission reaction.
3. combustion reaction.
4. chemical reaction.
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. |
The power obtained in a reactor using disintegration is 1000 kW. The mass decay of \(U^{235}\) per hour is:
1. 1 microgram
2. 10 microgram
3. 20 microgram
4. 40 microgram
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. | \(3.9 \times 10^{4} \text { years }\) |
If the nuclear force between two protons, two neutrons and between a proton and a neutron is denoted by respectively, then:
1.
2.
3.
4.