Unit 14 Particle Physics | Solve MCQ'S & Numericals | Class 11 Physics NBF Federal Board Islamabad

Playlist Class 11 NBF    • Federal Board class 11   00:00 MCQ'S unit 14 Particle Physics Numerical Problems 02:40 Q1. Alpha Decay of Uranium-238: Uranium-238 undergoes alpha decay, emitting an alpha particle (helium nucleus) with a mass of 4.00151 atomic mass units. Calculate the energy released in this alpha decay process. Speed of light (c) is approximately 3.00 x 10^8 meters per second, and 1 atomic mass unit (u) is approximately equal to 931.5 MeV/c². 07:29 Q2. Beta-Minus Decay of Carbon-14: Carbon-14 undergoes beta-minus (β-) decay, emitting a beta particle (electron) with a negligible mass. Calculate the energy released in this beta-minus decay process. Speed of light (c) is approximately 3.00 x 10^8 meters per second. 11:29 Q3. Gamma Decay and Photon Properties: A nucleus undergoes gamma decay, emitting a gamma ray photon with an energy of 2.00 MeV. Calculate the frequency and wavelength of this gamma ray. Speed of light (c) is approximately 3.00 x 10^8 meters per second. 14:55 4. Dirac Equation and Particle Solutions: If the negative solution of the Dirac equation is for an electron, prove that the positive solution for the same equation is not for a proton of the same momentum. 16:49 5. Conservation Laws in Particle Reactions: Show that the following particle reactions satisfy the laws of conservation of charge, lepton number, and baryon number: i) π⁺ + p → K⁺ + n ii) μ⁺ → e⁺ + νₑ + ν̄μ MCQ'S 1. Which fundamental conservation principle states that the total number of nucleons (protons and neutrons) remains constant in a closed system? A. charge B. energy C. nucleon D. momentum 2. Charge Conservation According to the principle of charge conservation, in any physical process, the total electric charge before and after the process must? A. decreases B. increases C. become zero D. becomes neutral 3. Nucleon Exchange In a nuclear reaction, if a nucleus emits an alpha particle (helium nucleus), what happens to the nucleon number (A) of the original nucleus: A. decreases by 1 B. decreases by 2 C. remains same D. increases by 1 4. Charge Exchange During beta-minus (β-) decay, a neutron is transformed into a proton, emitting an electron (beta particle) in the process. What happens to the total charge during this decay, the total charge: A. increases B. decreases C. remains same D. becomes neutral *5. Positrons in our atmosphere can be produced during the natural process of:* A. Spinning of earth B. lightning C. Earth's magnetic field D. Winds *6. Which type of carrier particle has not been found yet?* A. W-boson B. Z-boson C. pion D. graviton *7. What type of hadron is always constructed partially of an anti-quark?* A. baryon B. lepton C. meson D. photon *8. Analysis of which particles results into the search of Higgs boson?* A. W and Z bosons B. up and down quark C. mesons and baryons D. neutrinos and photons *9. Which device is used for proton decay?* A. Cyclotron B. Large Hadron Collider C. super-kamiokande D. Synchrotron *10. Lepton number for 'delta' particle is:* A. -1 B. 0 C. +1/2 D. +1 *11. Which particle has baryon number +1?* A. muon B. tau C. kaon D. omega *12. The particle which has the color property is:* A. pion B. kaon C. rho D. proton #PhysicsClass11 #FederalBoardPhysics #NBFIslamabadBoard #PhysicsSolutions #Class11Physics #PakistanStudies #PhysicsExercises #MCQsPhysics #NumericalPhysics #ShortQuestions #PhysicsTutorials #ExamPrep #PhysicsNotes #StudyMaterials #PakistanEducation #11thClassPhysics #PhysicsLectures #ScienceEducation #PakistanBoards #FederalBoard #NationalBookFoundation #IslamabadBoard #PhysicsProblems #PhysicsSolved