29/03/2020Nuclear Physics(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Nuclear Physics(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. "Material that absorbs excess neutrons to prevent an uncontrollably large release of energy" A "moderator" is defined above True False2. The mass defect of a certain nucleus is found to be 0.03 amu. Its binding energy is 27.93 eV 27.93 MeV 27.93 KeV 27.93 GeV3. In mid 1920s in Freiburg, Germany, the experiment made with Radionuclides administered to Rats was carried out by Ben Cason John Lawrence George de Havesy Darren Sugg4. The sun produces its light energy from the fission of helium atoms. False True5. "Device which converts a portion of the sun's radiated energy directly into a potential difference" What is defined? Active solar heater Photovoltaic cell Albedo Solar panel6. The time taken by the radioactive element to reduce to 1/e times is Half life Twice the mean life Half life/2 Mean life7. In β – decay Neutron number decreases by one mass number decreases by one Atomic number decreases by one Proton number remains the same8. The sun produces its light energy from the fission of helium atoms. True False9. "The ratio of power radiated per unit area by an object, to the power radiated per unit area by a black body at the same temperature" What is being defined? Emissivity E.m.f Feedback Coefficient of volume expansion10. Nuclide X has a half-life of 1 day and nuclide Y has a half-life of 5 days. In a particular sample, the activities of X and Y are found to be equal. When the activity is tested again after 10 days, the activity will be Entirely due to nuclide X Mostly due to nuclide Y Mostly due to nuclide X Due equally to nuclides X and Y11. What is the difference between the mass of the nucleus and the sum of the masses of its individual nucleons Binding energy per nucleon Binding energy None of the above Mass defect12. Black-body radiation can simply be defined as "the radiation from a perfect absorber" True False13. The ionisation power is maximum for α – particles β − particles γ – rays Neutrons14. A reactor design that utilizes plutonium-239 is known as a fast breeder reactor False True15. Loss of β particle is equivalent to All of the above None of the above Increase of one proton only Decrease of one proton only16. Beta decay can increase the atomic number of a nucleus by a number of 1 False True17. The explosion of atom bomb is based on the principle of Uncontrolled fission reaction Thermonuclear reaction Controlled fission reaction Fusion reaction18. Isotopes have Same proton number and neutron number Same mass number but different atomic number Same neutron number but different proton number Same proton number but different neutron number19. The nuclear radius of nucleus is 2.6 x 10ˆ-15 m 1.3 x 10ˆ-13 m 1.3 x 10ˆ-15 m 2.6 x 10ˆ-13 m20. The ionisation power is maximum for Neutrons β − particles α – particles γ – rays21. The average energy released per fission is 200 meV 200 MeV 200 GeV 200 eV22. Nuclear fission can be defined as a "nuclear reaction whereby small nuclei are induced to join together into larger nuclei and release energy in the process" True False23. In some Centers, the Nuclear Medicine department may also use implanted Capsules of isotopes to treat Cancers. Known as Brachytherapy Angiopathy Capslelotherapy Anglotherapy24. An artificial reaction in which a nucleus is bombarded with a nucleon, an alpha particle, or another small nucleus is known as an artificial [...] translation transmutation fission transfution25. The light that an element emits can be define as its emission spectrum True False26 out of 25Time is Up!