What are thermal neutrons ? Thermal neutrons are slow neutrons (having energy below 1 eV) which are in thermal equilibrium with their surroundings.

What are thermal neutrons ?
Thermal neutrons are slow neutrons (having energy below 1 eV) which are in thermal equilibrium with
their surroundings.
by

1 Answer

Answer :

Thermal neutrons are slow neutrons (having energy below 1 eV) which are in thermal equilibrium with their surroundings.
by

Related questions

The velocity of thermal (slow) neutrons triggering nuclear fissionreaction (having energy equal to 0.025 eV) is about __________metres/second.(A) 1100(B) 2200(C) 3300(D) 4400

Description : The velocity of thermal (slow) neutrons triggering nuclear fissionreaction (having energy equal to 0.025 eV) is about __________ metres/second. (A) 1100 (B) 2200 (C) 3300 (D) 4400

Last Answer : (B) 2200

Thermal neutrons which are used to cause the fission of U-235 haveenergy __________ eV.(A) < 0.025(B) > 1(C) 1-25(D) > 200

Description : Thermal neutrons which are used to cause the fission of U-235 haveenergy __________ eV. (A) < 0.025 (B) > 1 (C) 1-25 (D) > 200

Last Answer : (A) < 0.025

Thermal shield is used in high powered nuclear reactors to (A) Protect the walls of the reactor from radiation damageB) Absorb the fast neutrons(C) Slow down the secondary neutrons(D) Protect the fuel element from coming in contact with the coolant

Description : Thermal shield is used in high powered nuclear reactors to (A) Protect the walls of the reactor from radiation damage B) Absorb the fast neutrons (C) Slow down the secondary neutrons (D) Protect the fuel element from coming in contact with the coolant

Last Answer : (A) Protect the walls of the reactor from radiation damage

A fertile material is the one, which can be (A) Converted into fissile material on absorption of neutron (B) Fissioned by slow (thermal) neutrons (C) Fissioned by fast neutrons

Description : A fertile material is the one, which can be (A) Converted into fissile material on absorption of neutron (B) Fissioned by slow (thermal) neutrons (C) Fissioned by fast neutrons

Last Answer : (A) Converted into fissile material on absorption of neutron

Zeroth law of thermodynamics  (a) deals with conversion of mass and energy  (b) deals with reversibility and irreversibility of process  (c) states that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other  (d) deals with heat engines  (e) does not exist.

Description : Zeroth law of thermodynamics  (a) deals with conversion of mass and energy  (b) deals with reversibility and irreversibility of process  (c) states that if two systems are both in equilibrium with a ... in thermal equilibrium with each other  (d) deals with heat engines  (e) does not exist.

Last Answer : Answer : c

What are thermal neutrons ?

Description : What are thermal neutrons ?

Last Answer : Thermal neutrons are slow neutrons (having energy below 1 eV) which are in thermal equilibrium with their surroundings.

Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec. (A) 1 (B) 2200 (C) 3 × 10 11 (D) 9 × 10 21

Description : Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec. (A) 1 (B) 2200 (C) 3 × 10 11 (D) 9 × 10 21

Last Answer : (B) 2200

What system in which neither mass nor energy cross the boundaries and is not influenced by the surroundings?  a. Closed system  b. Open system  c. Isolated system  d. All of these

Description : What system in which neither mass nor energy cross the boundaries and is not influenced by the surroundings?  a. Closed system  b. Open system  c. Isolated system  d. All of these

Last Answer : Isolated system

Heavy water used in the nuclear reactors to slow down the speed of neutrons is (A) Highly purified water (B) A compound of oxygen and deuterium (C) Water having dissolved salts of heavy metals (D) None of these

Description : Heavy water used in the nuclear reactors to slow down the speed of neutrons is (A) Highly purified water (B) A compound of oxygen and deuterium (C) Water having dissolved salts of heavy metals (D) None of these

Last Answer : (B) A compound of oxygen and deuterium

If two systems are in the thermal equilibrium with a third system, then they must be in thermal equilibrium with each other.  a. Zeroth Law of Thermodynamics  b. First Law of Thermodynamics  c. Second Law of Thermodynamics  d. Third Law of Thermodynamics

Description : If two systems are in the thermal equilibrium with a third system, then they must be in thermal equilibrium with each other.  a. Zeroth Law of Thermodynamics  b. First Law of Thermodynamics  c. Second Law of Thermodynamics  d. Third Law of Thermodynamics

Last Answer : Zeroth Law of Thermodynamics

What states that for any two bodies in thermal equilibrium, the ratios of emissive power to the absorptivity are equal?

Description : What states that for any two bodies in thermal equilibrium, the ratios of emissive power to the absorptivity are equal?  A. Kirchhoff’s radiation law  B. Newton’s law of cooling  C. Stefan-Boltzmann law  D. Hess’s law

Last Answer : Kirchhoff’s radiation law

What states that if two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other?  A. Zeroth law of thermodynamics  B. First law of thermodynamics  C. Second law of thermodynamics  D. Third law of thermodynamics

Description : What states that if two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other?  A. Zeroth law of thermodynamics  B. First law of thermodynamics  C. Second law of thermodynamics  D. Third law of thermodynamics

Last Answer : Zeroth law of thermodynamics

A system is said to be in thermodynamic equilibrium if it maintains ______ equilibrium.  A. Mechanical and phase  B. Thermal and chemical  C. Thermal, mechanical and chemical  D. Thermal, phase, mechanical and chemical

Description : A system is said to be in thermodynamic equilibrium if it maintains ______ equilibrium.  A. Mechanical and phase  B. Thermal and chemical  C. Thermal, mechanical and chemical  D. Thermal, phase, mechanical and chemical

Last Answer : Thermal, phase, mechanical and chemical

A system is in ______ equilibrium of its chemical composition does not change with time, i.e., no chemical reaction occurs.  A. Chemical  B. Thermal  C. Mechanical  D. Phase

Description : A system is in ______ equilibrium of its chemical composition does not change with time, i.e., no chemical reaction occurs.  A. Chemical  B. Thermal  C. Mechanical  D. Phase

Last Answer : Chemical

If a system involves two phases, it is in ______ equilibrium when the mass of each phase reaches an equilibrium level and stays there.  A. Chemical  B. Thermal  C. Mechanical  D. Phase

Description : If a system involves two phases, it is in ______ equilibrium when the mass of each phase reaches an equilibrium level and stays there.  A. Chemical  B. Thermal  C. Mechanical  D. Phase

Last Answer : Phase

A system is in ______ equilibrium if the temperature is the same throughout the entire system.  A. Static  B. Thermal  C. Mechanical  D. Phase

Description : A system is in ______ equilibrium if the temperature is the same throughout the entire system.  A. Static  B. Thermal  C. Mechanical  D. Phase

Last Answer : Thermal

A system which consists of fixed amount of mass and no mass can cross its boundary called _____.  A. Equilibrium system  B. Thermal equilibrium system  C. Open system  D. Closed system

Description : A system which consists of fixed amount of mass and no mass can cross its boundary called _____.  A. Equilibrium system  B. Thermal equilibrium system  C. Open system  D. Closed system

Last Answer : Closed system

When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called  A. Zeroth law of thermodynamics  B. First law of thermodynamics  C. Second law of thermodynamics  D. Kelvin Planck’s law

Description : When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called  A. Zeroth law of thermodynamics  B. First law of thermodynamics  C. Second law of thermodynamics  D. Kelvin Planck’s law

Last Answer : A. Zeroth law of thermodynamics

For a body cooling in a draft, the rate of heat loss is proportional to the difference in temperature between the body and its surroundings.  a. Nemst Effect  b. Caloric Theory  c. Joule’s Law  d. Newton’s Law of Cooling

Description : For a body cooling in a draft, the rate of heat loss is proportional to the difference in temperature between the body and its surroundings.  a. Nemst Effect  b. Caloric Theory  c. Joule’s Law  d. Newton’s Law of Cooling

Last Answer : Newton’s Law of Cooling

The contact surface shared by both the system and the surroundings is called _________.  a. wall  b. boundary  c. interface  d. intersection

Description : The contact surface shared by both the system and the surroundings is called _________.  a. wall  b. boundary  c. interface  d. intersection

Last Answer : boundary

What is the real or imaginary surface that separates the system from its surroundings?  A. Division  B. Wall  C. Boundary  D. Interface

Description : What is the real or imaginary surface that separates the system from its surroundings?  A. Division  B. Wall  C. Boundary  D. Interface

Last Answer : Boundary

What is the mass or region outside the system called?  A. Surroundings  B. Boundary  C. Volume  D. Environment

Description : What is the mass or region outside the system called?  A. Surroundings  B. Boundary  C. Volume  D. Environment

Last Answer : Surroundings

What is defined a region in space chosen for study?  A. Surroundings  B. System  C. Boundary  D. Volume

Description : What is defined a region in space chosen for study?  A. Surroundings  B. System  C. Boundary  D. Volume

Last Answer : System

The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its kinetic energy in the first excit

Description : The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its kinetic energy in the first excit

Last Answer : The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its ... 6.8 eV C. 3.4 eV D. 1.825 eV

One energy difference between the states `n = 2` and `n= 3` is `"E eV"`, in hydrogen atom. The ionisation potential of `H` atom is -

Description : One energy difference between the states `n = 2` and `n= 3` is `"E eV"`, in hydrogen atom. The ionisation potential of `H` atom is -

Last Answer : One energy difference between the states `n = 2` and `n= 3` is `"E eV"`, in hydrogen atom. The ionisation potential ... B. 5.6 E C. 7.2 E D. 13.2 E

The ionisation energy of `H` is `13.6 eV`. Calculate the ionization energy of `Li^(2+)` ions.

Description : The ionisation energy of `H` is `13.6 eV`. Calculate the ionization energy of `Li^(2+)` ions.

Last Answer : The ionisation energy of `H` is `13.6 eV`. Calculate the ionization energy of `Li^(2+)` ions. A. 13.6 eV B. 27.2 eV C. 40 .8 eV D. 122 .4 eV

If the total energy of an electron in a hydrogen atom in an exicted state is -3.4 eV , then the de- broglie wavelegth of the electron is :-

Description : If the total energy of an electron in a hydrogen atom in an exicted state is -3.4 eV , then the de- broglie wavelegth of the electron is :-

Last Answer : If the total energy of an electron in a hydrogen atom in an exicted state is -3.4 eV , then the de- broglie ... `5xx10^(-9)m` D. `9.3xx10^(-12)m`

An electron , in a hydrogen-like atom, is in excited state. It has a total energy of -3.4 eV. Calculate (a) the kinetic energy and (b) the de Broglie

Description : An electron , in a hydrogen-like atom, is in excited state. It has a total energy of -3.4 eV. Calculate (a) the kinetic energy and (b) the de Broglie

Last Answer : An electron , in a hydrogen-like atom, is in excited state. It has a total energy of -3.4 ... and (b) the de Broglie wavelength of the electron.

An electron of energy 150 eV describes a circle in a magnetic field of 0.1 tesla. Calculate the radius of the curcle.

Description : An electron of energy 150 eV describes a circle in a magnetic field of 0.1 tesla. Calculate the radius of the curcle.

Last Answer : An electron of energy 150 eV describes a circle in a magnetic field of 0.1 tesla. Calculate the radius of the curcle.

A hydrogen atom in a state of binding energy 0.85 eV makes a transition to a state of excitation energy of 10.2 eV . Find the energy and wavelength of

Description : A hydrogen atom in a state of binding energy 0.85 eV makes a transition to a state of excitation energy of 10.2 eV . Find the energy and wavelength of

Last Answer : A hydrogen atom in a state of binding energy 0.85 eV makes a transition to a state of ... . Find the energy and wavelength of photon emitted.

An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what energy level did it jump? How many spectral lines may be emitted in the

Description : An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what energy level did it jump? How many spectral lines may be emitted in the

Last Answer : An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what ... to lower energy level? Calculate the corresponding wavelengths.

A hydrogen like atom with atomic number Z is in an excited state of quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a tr

Description : A hydrogen like atom with atomic number Z is in an excited state of quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a tr

Last Answer : A hydrogen like atom with atomic number Z is in an excited state of quantum number 2n. It can emit a ... state energy of hydrogen atom is - 13. 6 eV.

A proton of energy `8 eV` is moving in a circular path in a uniform magnetic field. The energy of an alpha particle moving in the same magnetic field

Description : A proton of energy `8 eV` is moving in a circular path in a uniform magnetic field. The energy of an alpha particle moving in the same magnetic field

Last Answer : A proton of energy `8 eV` is moving in a circular path in a uniform magnetic field. The energy of an alpha ... will be A. 4eV B. 22eV C. 8eV D. 6eV

If 48 eV of energy is required to move a charge through a potential difference of 12 V determine the charge involved?

Description : If 48 eV of energy is required to move a charge through a potential difference of 12 V determine the charge involved?

Last Answer : Need answer

Find the range of band gap energy for conductors. a) >6 eV b) 0.2-0.4 eV c) 0.4-2 eV d) 2-6 eV

Description : Find the range of band gap energy for conductors. a) >6 eV b) 0.2-0.4 eV c) 0.4-2 eV d) 2-6 eV

Last Answer : b) 0.2-0.4 eV

In Helium-neon Laser, in meta stable state, helium is located at the energy level: a) 20.66 eV b) 20.77 eV c) 20.61 eV d) 20.71 eV

Description : In Helium-neon Laser, in meta stable state, helium is located at the energy level: a) 20.66 eV b) 20.77 eV c) 20.61 eV d) 20.71 eV

Last Answer : c) 20.61 eV

The amount of energy required to completely remove an electron from the first Bohr orbit is a) 13.6 MeV b) 13.6 eV c) 1.36 MeV d) 1.36 eV

Description : The amount of energy required to completely remove an electron from the first Bohr orbit is a) 13.6 MeV b) 13.6 eV c) 1.36 MeV d) 1.36 eV

Last Answer : b) 13.6 eV

The phenomena of pair production occurs only when the energy of incident photon is least equal a) 10.2 MeV b) 1.02 MeV c) 1.02 eV d) 0.102 MeV

Description : The phenomena of pair production occurs only when the energy of incident photon is least equal a) 10.2 MeV b) 1.02 MeV c) 1.02 eV d) 0.102 MeV

Last Answer : b) 1.02 MeV

Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Description : Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Last Answer : Moderator is a material which is used to slow down the neutrons produced during nuclear fission ... neutrons C. magnetic neutrons D. electric neutrons

Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Description : Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Last Answer : Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The ... water B. Graphite C. Beryllium D. Sodium

Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Description : Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Last Answer : Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The ... mass number only D. be all the above three

Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Description : Moderator is a material which is used to slow down the neutrons produced during nuclear fission. The neutrons from the source are of high speed and en

Last Answer : Moderator is a material which is used to slow down the neutrons produced during nuclear fission ... . absorbs thermal energy. Produced in the reactors

The number of neutrons accompanying the formation of `._(54)Xe^(139)` and `._(38)Sr^(94)` from the absorption of a slow neutron by `._(92)U^(235)`, fo

Description : The number of neutrons accompanying the formation of `._(54)Xe^(139)` and `._(38)Sr^(94)` from the absorption of a slow neutron by `._(92)U^(235)`, fo

Last Answer : The number of neutrons accompanying the formation of `._(54)Xe^(139)` and `._(38)Sr^(94)` from the ... `._(92)U^(235)`, followed by nuclear fission is

In a nuclear reactor the moderator is usually made of graphite placed between the fuel rods used to slow down neutrons all of the above none of the above?

Description : In a nuclear reactor the moderator is usually made of graphite placed between the fuel rods used to slow down neutrons all of the above none of the above?

Last Answer : Feel Free to Answer

The function of moderators in nuclear reactor is to (A) Slow down the secondary neutrons (B) Absorb the secondary neutrons (C) Control the chain reaction (D) None of these

Description : The function of moderators in nuclear reactor is to (A) Slow down the secondary neutrons (B) Absorb the secondary neutrons (C) Control the chain reaction (D) None of these

Last Answer : (A) Slow down the secondary neutrons

The number of neutrons accompanying the formationof 54Xe139 and 38Sr94from the absorption of a slow neutron by 92U235,followed by nuclear fission is(A) 1(B) 2(C) 3(D) 4

Description : The number of neutrons accompanying the formationof 54Xe 139 and 38Sr 94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is (A) 1 (B) 2 (C) 3 (D) 4

Last Answer : (C) 3

A moderator is used in nuclear reactor in order to ? A. Accelerate the neutrons B. Slow down the speed of the neutrons (Answer) C. Increase the number of elections D. Decrease the number of electrons E. None of these

Description : A moderator is used in nuclear reactor in order to ? A. Accelerate the neutrons B. Slow down the speed of the neutrons (Answer) C. Increase the number of elections D. Decrease the number of electrons E. None of these

Last Answer : B. Slow down the speed of the neutrons (Answer)

In the nuclear reactors, moderators are used to : (1) Accelerate neutrons (2) Absorb the neutrons (3) Slow down the neutrons (4) Generate neutrons

Description : In the nuclear reactors, moderators are used to : (1) Accelerate neutrons (2) Absorb the neutrons (3) Slow down the neutrons (4) Generate neutrons

Last Answer : Slow down the neutrons

Heat is generated in a nuclear reactor (thermal) by (A) Combustion of a nuclear fuel e.g. uranium (B) Fusion of atoms of uranium (C) Absorption of neutrons in uranium atoms (D) Fission of U-235 by neutrons

Description : Heat is generated in a nuclear reactor (thermal) by (A) Combustion of a nuclear fuel e.g. uranium (B) Fusion of atoms of uranium (C) Absorption of neutrons in uranium atoms (D) Fission of U-235 by neutrons

Last Answer : (D) Fission of U-235 by neutrons

A thermal nuclear reactor compared to a fast breeder reactor (A) Uses slower neutrons for fission (B) Uses faster neutrons for fission (C) Gives higher power density (D) Requires less fuel to run at the same power level

Description : A thermal nuclear reactor compared to a fast breeder reactor (A) Uses slower neutrons for fission (B) Uses faster neutrons for fission (C) Gives higher power density (D) Requires less fuel to run at the same power level

Last Answer : (A) Uses slower neutrons for fission