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. Define "radioactive decay"The process by which an atom loses its mass over timeThe process by which atomic nuclei decayThe process by which an atom loses its electrons to the surroundings2. 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 increases by 1Proton number unchanged and nucleon number increases by 1Proton number increases by 1 and nucleon number unchanged3. The nucleons in a nucleus are attracted byMagnetic forceGravitational forceElectrostatic forceNuclear force4. The source of the Sun's energy is FissionRadioactivityIonizationFusion5. The time taken by the radioactive element to reduce to 1/e times isTwice the mean lifeMean lifeHalf lifeHalf life/26. 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 beEntirely due to nuclide XMostly due to nuclide XMostly due to nuclide YDue equally to nuclides X and Y7. The end result of the Nuclear Medicine Imaging process isX-rayData SetScanOutput Data8. The sun produces its light energy from the fission of helium atoms.FalseTrue9. Black-body radiation can simply be defined as "the radiation from a perfect absorber"TrueFalse10. An alpha particle is half the size of a helium atom.FalseTrue11. In a fission chain reaction,Gamma radiation produced in one fission reaction causes further fission reactionsEnergy from one fission reaction causes further fission reactionsnuclei produced in one fission reaction cause further fission reactions.neutrons from one fission reaction cause further fission reactions.12. Which process produces energy by the splitting of large atoms?FusionFissile materialFissionProliferation13. "Half-life" can simply be defined as the time taken for half the number of nucleons in a sample to decayTrueFalse14. Who is the Father of Nuclear Medicine ?Darren SuggJohn LawrenceGeorge de HavesyBen Cason15. Fission technology is used in the thermonuclear bomb.TrueFalse16. The coefficient which records the fractional change in volume per degree change in temperature is known as the coefficient of [...] volume expansionarea expansionsurface expansion17. The half life period of is 10.1 minute. Its life time is40.320.2 mins5.05 minsinfinity18. A reactor design that utilizes plutonium-239 is known as a fast breeder reactorTrueFalse19. The half life period of a certain radioactive element with disintegration constant 0.0693 per day is10 days140 days1.4 days14 days20. Gamma rays are harmless to the body.FalseTrue21. Positive rays of the same element produce two different traces in a Bainbridge mass spectrometer. The positive ions haveSame mass with same velocitySame mass with different velocityDifferent mass with different velocityDifferent mass with same velocity22. Which of the following provides evidence for the existence of neutrons?The Geiger-Marsden experimentIsotopesNatural radioactive decayArtificial transmutations of elements23. The mass defect of a certain nucleus is found to be 0.03 amu. Its binding energy is27.93 GeV27.93 eV27.93 MeV27.93 KeV24. A source of energy that cannot be used up is said to berenewablestorednon renewable25. Loss of β particle is equivalent toIncrease of one proton onlyAll of the aboveNone of the aboveDecrease of one proton only26 out of 25Time is Up!