363785
Which of the following is best nuclear fuel
1 thorium 236
2 plutonium 239
3 uranium 236
4 neptunium 239
Explanation:
Plutonium 239 is processed by breeder mechanism to be used as nuclear feul.
PHXII13:NUCLEI
363786
The principle of controlled chain reaction is used in
1 Atom bomb
2 The core of sun
3 Artificial radioactivity
4 Atomic energy reactor
Explanation:
In nuclear reactor, nuclear fission can be carried out through a sustained and a controlled chain reaction.
PHXII13:NUCLEI
363787
The fission of \(^{235}U\) can be triggered by the absorption of a slow neutron by a nucleus. Similarly a slow proton can also be used. This statement is
1 correct
2 incorrect
3 information is insufficient
4 None of the above
Explanation:
Because the neutron has no electric charge, it experiences no electric repulsion from a \({U^{235}}\) nucleus. Hence, a slow moving neutron can approach and enter a \({U^{235}}\) nucleus, thereby providing the excitation needed to trigger fission. In contrast, a slow moving proton feels a strong repulsion from a \({U^{235}}\) nucleus. It never gets close to the nucleus, so it cannot trigger nuclear fission. Hence, given statement is incorrect.
PHXII13:NUCLEI
363788
Assertion : Cadmium rods used in a nuclear reactor, control the rate of fission. Reason : Cadmium rods speed up the slow neutrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Cadmium rods find application in nuclear reactors to regulate the rate of fission. These rods do not alter the speed of the neutrons generated during the fission of uranium-235 (^235U). Instead, their function is to absorb these neutrons, effectively controlling and regulating the power level of the reactor. So, \(C d\) rod is moderator. So correct option is (3).
PHXII13:NUCLEI
363789
Thermal neutrons are those which
1 Move with high velocities
2 Are at very high temperature
3 Are at rest
4 Have kinetic energies similar to those of surrounding molecules
Explanation:
When fast moving neutrons pass through a moderator, they collide with the molecules of the moderator. As a result of this the neutrons are in thermal equillibrium with the surrounding molecules of moderator. These neutrons are called thermal neutrons.
363785
Which of the following is best nuclear fuel
1 thorium 236
2 plutonium 239
3 uranium 236
4 neptunium 239
Explanation:
Plutonium 239 is processed by breeder mechanism to be used as nuclear feul.
PHXII13:NUCLEI
363786
The principle of controlled chain reaction is used in
1 Atom bomb
2 The core of sun
3 Artificial radioactivity
4 Atomic energy reactor
Explanation:
In nuclear reactor, nuclear fission can be carried out through a sustained and a controlled chain reaction.
PHXII13:NUCLEI
363787
The fission of \(^{235}U\) can be triggered by the absorption of a slow neutron by a nucleus. Similarly a slow proton can also be used. This statement is
1 correct
2 incorrect
3 information is insufficient
4 None of the above
Explanation:
Because the neutron has no electric charge, it experiences no electric repulsion from a \({U^{235}}\) nucleus. Hence, a slow moving neutron can approach and enter a \({U^{235}}\) nucleus, thereby providing the excitation needed to trigger fission. In contrast, a slow moving proton feels a strong repulsion from a \({U^{235}}\) nucleus. It never gets close to the nucleus, so it cannot trigger nuclear fission. Hence, given statement is incorrect.
PHXII13:NUCLEI
363788
Assertion : Cadmium rods used in a nuclear reactor, control the rate of fission. Reason : Cadmium rods speed up the slow neutrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Cadmium rods find application in nuclear reactors to regulate the rate of fission. These rods do not alter the speed of the neutrons generated during the fission of uranium-235 (^235U). Instead, their function is to absorb these neutrons, effectively controlling and regulating the power level of the reactor. So, \(C d\) rod is moderator. So correct option is (3).
PHXII13:NUCLEI
363789
Thermal neutrons are those which
1 Move with high velocities
2 Are at very high temperature
3 Are at rest
4 Have kinetic energies similar to those of surrounding molecules
Explanation:
When fast moving neutrons pass through a moderator, they collide with the molecules of the moderator. As a result of this the neutrons are in thermal equillibrium with the surrounding molecules of moderator. These neutrons are called thermal neutrons.
363785
Which of the following is best nuclear fuel
1 thorium 236
2 plutonium 239
3 uranium 236
4 neptunium 239
Explanation:
Plutonium 239 is processed by breeder mechanism to be used as nuclear feul.
PHXII13:NUCLEI
363786
The principle of controlled chain reaction is used in
1 Atom bomb
2 The core of sun
3 Artificial radioactivity
4 Atomic energy reactor
Explanation:
In nuclear reactor, nuclear fission can be carried out through a sustained and a controlled chain reaction.
PHXII13:NUCLEI
363787
The fission of \(^{235}U\) can be triggered by the absorption of a slow neutron by a nucleus. Similarly a slow proton can also be used. This statement is
1 correct
2 incorrect
3 information is insufficient
4 None of the above
Explanation:
Because the neutron has no electric charge, it experiences no electric repulsion from a \({U^{235}}\) nucleus. Hence, a slow moving neutron can approach and enter a \({U^{235}}\) nucleus, thereby providing the excitation needed to trigger fission. In contrast, a slow moving proton feels a strong repulsion from a \({U^{235}}\) nucleus. It never gets close to the nucleus, so it cannot trigger nuclear fission. Hence, given statement is incorrect.
PHXII13:NUCLEI
363788
Assertion : Cadmium rods used in a nuclear reactor, control the rate of fission. Reason : Cadmium rods speed up the slow neutrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Cadmium rods find application in nuclear reactors to regulate the rate of fission. These rods do not alter the speed of the neutrons generated during the fission of uranium-235 (^235U). Instead, their function is to absorb these neutrons, effectively controlling and regulating the power level of the reactor. So, \(C d\) rod is moderator. So correct option is (3).
PHXII13:NUCLEI
363789
Thermal neutrons are those which
1 Move with high velocities
2 Are at very high temperature
3 Are at rest
4 Have kinetic energies similar to those of surrounding molecules
Explanation:
When fast moving neutrons pass through a moderator, they collide with the molecules of the moderator. As a result of this the neutrons are in thermal equillibrium with the surrounding molecules of moderator. These neutrons are called thermal neutrons.
363785
Which of the following is best nuclear fuel
1 thorium 236
2 plutonium 239
3 uranium 236
4 neptunium 239
Explanation:
Plutonium 239 is processed by breeder mechanism to be used as nuclear feul.
PHXII13:NUCLEI
363786
The principle of controlled chain reaction is used in
1 Atom bomb
2 The core of sun
3 Artificial radioactivity
4 Atomic energy reactor
Explanation:
In nuclear reactor, nuclear fission can be carried out through a sustained and a controlled chain reaction.
PHXII13:NUCLEI
363787
The fission of \(^{235}U\) can be triggered by the absorption of a slow neutron by a nucleus. Similarly a slow proton can also be used. This statement is
1 correct
2 incorrect
3 information is insufficient
4 None of the above
Explanation:
Because the neutron has no electric charge, it experiences no electric repulsion from a \({U^{235}}\) nucleus. Hence, a slow moving neutron can approach and enter a \({U^{235}}\) nucleus, thereby providing the excitation needed to trigger fission. In contrast, a slow moving proton feels a strong repulsion from a \({U^{235}}\) nucleus. It never gets close to the nucleus, so it cannot trigger nuclear fission. Hence, given statement is incorrect.
PHXII13:NUCLEI
363788
Assertion : Cadmium rods used in a nuclear reactor, control the rate of fission. Reason : Cadmium rods speed up the slow neutrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Cadmium rods find application in nuclear reactors to regulate the rate of fission. These rods do not alter the speed of the neutrons generated during the fission of uranium-235 (^235U). Instead, their function is to absorb these neutrons, effectively controlling and regulating the power level of the reactor. So, \(C d\) rod is moderator. So correct option is (3).
PHXII13:NUCLEI
363789
Thermal neutrons are those which
1 Move with high velocities
2 Are at very high temperature
3 Are at rest
4 Have kinetic energies similar to those of surrounding molecules
Explanation:
When fast moving neutrons pass through a moderator, they collide with the molecules of the moderator. As a result of this the neutrons are in thermal equillibrium with the surrounding molecules of moderator. These neutrons are called thermal neutrons.
363785
Which of the following is best nuclear fuel
1 thorium 236
2 plutonium 239
3 uranium 236
4 neptunium 239
Explanation:
Plutonium 239 is processed by breeder mechanism to be used as nuclear feul.
PHXII13:NUCLEI
363786
The principle of controlled chain reaction is used in
1 Atom bomb
2 The core of sun
3 Artificial radioactivity
4 Atomic energy reactor
Explanation:
In nuclear reactor, nuclear fission can be carried out through a sustained and a controlled chain reaction.
PHXII13:NUCLEI
363787
The fission of \(^{235}U\) can be triggered by the absorption of a slow neutron by a nucleus. Similarly a slow proton can also be used. This statement is
1 correct
2 incorrect
3 information is insufficient
4 None of the above
Explanation:
Because the neutron has no electric charge, it experiences no electric repulsion from a \({U^{235}}\) nucleus. Hence, a slow moving neutron can approach and enter a \({U^{235}}\) nucleus, thereby providing the excitation needed to trigger fission. In contrast, a slow moving proton feels a strong repulsion from a \({U^{235}}\) nucleus. It never gets close to the nucleus, so it cannot trigger nuclear fission. Hence, given statement is incorrect.
PHXII13:NUCLEI
363788
Assertion : Cadmium rods used in a nuclear reactor, control the rate of fission. Reason : Cadmium rods speed up the slow neutrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Cadmium rods find application in nuclear reactors to regulate the rate of fission. These rods do not alter the speed of the neutrons generated during the fission of uranium-235 (^235U). Instead, their function is to absorb these neutrons, effectively controlling and regulating the power level of the reactor. So, \(C d\) rod is moderator. So correct option is (3).
PHXII13:NUCLEI
363789
Thermal neutrons are those which
1 Move with high velocities
2 Are at very high temperature
3 Are at rest
4 Have kinetic energies similar to those of surrounding molecules
Explanation:
When fast moving neutrons pass through a moderator, they collide with the molecules of the moderator. As a result of this the neutrons are in thermal equillibrium with the surrounding molecules of moderator. These neutrons are called thermal neutrons.
