Chapter 31 – Nuclei
Sahay Sir > Question Answers > AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 31 - Nuclei
If decay constant of a radioactive sample is 0.05 per year, then find the time (in year) for which sample will decay by 75%.
28
Nov
If decay constant of a radioactive sample is 0.05 per year, then find the time (in year) for which sample will decay by 75%. If decay constant of a radioactive sample is 0.05 per year then find the time (in year) for which sample will decay by 75%. November 28, 2020 Category: AIIMS Last 24 [...]
In a nuclear fusion reaction, two nuclei, A and B fuse to produce a nucleus C, releasing an amount of energy ΔE in the process. If the mass defects of the three nuclei are ΔMA, ΔMB and ΔMC respectively, then which of the following relations holds? Here, c is the speed of light.
28
Nov
In a nuclear fusion reaction, two nuclei, A and B fuse to produce a nucleus C, releasing an amount of energy ΔE in the process. If the mass defects of the three nuclei are ΔMA, ΔMB and ΔMC respectively, then which of the following relations holds? Here, c is the speed of light. A and [...]
The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2(t2 > t1). If its mean life is T, then
28
Nov
The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2(t2 > t1). If its mean life is T, then The activity of a sample of radioactive material is A1 at time t1 and A2 at time t2(t2 > t1). If its mean life is T then November [...]
A neutron in a nuclear reactor collides head on elastically with the nucleus of a carbon atom initially at rest. The fraction of kinetic energy transferred from the neutron to the carbon atom is
28
Nov
A neutron in a nuclear reactor collides head on elastically with the nucleus of a carbon atom initially at rest. The fraction of kinetic energy transferred from the neutron to the carbon atom is A neutron in a nuclear reactor collides head on elastically with the nucleus of a carbon atom initially at rest. The [...]
Two radioactive materials X1 and X2 have decay constants 10λ and λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X1 to that of X2 will be 1/e after a time
28
Nov
Two radioactive materials X1 and X2 have decay constants 10λ and λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X1 to that of X2 will be 1/e after a time then the ratio of the number of nuclei of X1 to that of [...]
An atom of mass number 15 and atomic number 7 captures an α-particle and then emits a proton. The mass number and atomic number of the resulting atom will be respectively
28
Nov
An atom of mass number 15 and atomic number 7 captures an α-particle and then emits a proton. The mass number and atomic number of the resulting atom will be respectively An atom of mass number 15 and atomic number 7 captures an α-particle and then emits a proton. The mass number and atomic number [...]
The half-life of radium is 1600 years. What is the fraction of sample undecayed after 6400 years?
28
Nov
The half-life of radium is 1600 years. What is the fraction of sample undecayed after 6400 years? The half-life of radium is 1600 years. What is the fraction of sample undecayed after 6400 years? November 28, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions , Chapter 31 - [...]
n-alpha particles per second are emitted from N atoms of a radioactive element. The half-life of the radioactive element is
28
Nov
n-alpha particles per second are emitted from N atoms of a radioactive element. The half-life of the radioactive element is n-alpha particles per second are emitted from N atoms of a radioactive element. The half-life of the radioactive element is November 28, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry [...]
In beta plus decay a. antineutrino is produced with electron b. neutrino is produced with positron c. neutron is produced with electron d. none of these
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Nov
In beta plus decay a. antineutrino is produced with electron b. neutrino is produced with positron c. neutron is produced with electron d. none of these In beta plus decay a. antineutrino is produced with electron b. neutrino is produced with positron c. neutron is produced with electron d. none of these November 28, 2020 [...]
When a slow neutron is captured by a U92235 nucleus, a fission energy releasing 200 MeV. If power of nuclear reactor is 100 W then rate of nuclear fission is
28
Nov
When a slow neutron is captured by a U92235 nucleus, a fission energy releasing 200 MeV. If power of nuclear reactor is 100 W then rate of nuclear fission is a fission energy releasing 200 MeV. If power of nuclear reactor is 100 W then rate of nuclear fission is When a slow neutron is [...]