29/03/2020 Nuclear 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 FalseTrue2. The nucleons in a nucleus are attracted by Magnetic forceNuclear forceGravitational forceElectrostatic force3. The average energy released per fission is 200 meV200 MeV200 GeV200 eV4. The radio-isotope used in agriculture is (3)(2)(1)(4)5. 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 beMostly due to nuclide YMostly due to nuclide XEntirely due to nuclide XDue equally to nuclides X and Y6. The nuclei are example ofIsotopesIsomersIsotonesisobars7. Which process produces energy by the splitting of large atoms? FusionFissionFissile materialProliferation8. The ionisation power is maximum for α – particlesNeutronsβ − particlesγ – rays9. "The name given to a particular species of atom (one whose nucleus contains a specified number of protons and a specified number of neutrons)" What is being defined?NucleonNuclideNucleusNeutron10. Nuclear fission can be explained by Quark modelLiquid drop modelBohr atom modelShell model11. "Device which converts a portion of the sun's radiated energy directly into a potential difference" What is defined?Solar panelAlbedoActive solar heaterPhotovoltaic cell12. The discovery of Artificial Radioactivity and the production of Radionuclide can be dated back to 193019341932193613. In a fission chain reaction,Energy from one fission reaction causes further fission reactionsneutrons from one fission reaction cause further fission reactions.Gamma radiation produced in one fission reaction causes further fission reactionsnuclei produced in one fission reaction cause further fission reactions.14. The half life period of a certain radioactive element with disintegration constant 0.0693 per day is 140 days10 days14 days1.4 days15. A neutron is captured by a nucleus. Which of the following gives the changes in the atomic (proton) number and mass (nucleon) number of the nucleus? Proton number unchanged and nucleon number unchangedProton number increases by 1 and nucleon number unchangedProton number increases by 1 and nucleon number increases by 1Proton number unchanged and nucleon number increases by 116. The reading of a detector of radioactive radiation falls from an average rate of 800 per minute to an average of 1000 per minute in a period of 24 minutes. The half-life is8 minutes6 minutes12 minutes3 minutes17. The time taken by the radioactive element to reduce to 1/e times is Mean lifeTwice the mean lifeHalf lifeHalf life/218. Gamma rays are harmless to the body. TrueFalse19. The half life period of is 10.1 minute. Its life time is40.3infinity5.05 mins20.2 mins20. Wien's displacement law relates the wavelength at which the intensity of the radiation is at maximum, to the temperature of a [...]Black bodyRed bodyBlue body21. Beta decay can increase the atomic number of a nucleus by a number of 1TrueFalse22. The mass defect of a certain nucleus is found to be 0.03 amu. Its binding energy is 27.93 MeV27.93 KeV27.93 eV27.93 GeV23. Which process produces energy by the splitting of large atoms? FissionProliferationFusionFissile material24. In the nuclear reaction, X-stands forDeutronElectronNeutronProton25. The sun produces its light energy from the fission of helium atoms. FalseTrue26 out of 25Time is Up!