This set of Class 12 Physics Chapter 13 Multiple Choice Questions & Answers (MCQs) focuses on “Nucleus – Radioactivity”. 1. Radioactive material decays by simultaneous emission of two particles with respective half-lives 1620 and 810 years. The time, in years, after which one-fourth of the material remains? a) 1080 b) 2430 c) 3240 d) 4860 … Read more
This set of Class 12 Physics Chapter 13 Multiple Choice Questions & Answers (MCQs) focuses on “Nuclear Force”. 1. Which of the following best define nuclear forces? a) The attraction between protons and neutrons b) Repulsion between protons and neutrons c) The attraction between protons and electrons d) The attraction between electrons and neutrons 2. … Read more
This set of Class 12 Physics Chapter 13 Multiple Choice Questions & Answers (MCQs) focuses on “Size of the Nucleus”. 1. Identify the expression for the nuclear radius from the following. a) R = R0 ∛A b) R = R0 √A c) R = R0 A3 d) R = R0 A2 2. Who measured the … Read more
This set of Class 12 Physics Chapter 13 Multiple Choice Questions & Answers (MCQs) focuses on “Nuclei”. These MCQs are created based on the latest CBSE syllabus and the NCERT curriculum, offering valuable assistance for exam preparation. 1. The neutron was discovered by whom? a) Marie Curie b) Pierre Curie c) Rutherford d) James Chadwick … Read more
This set of Class 12 Physics Chapter 12 Multiple Choice Questions & Answers (MCQs) focuses on “DE Broglie’s Explanation of Bohr’s Second Postulate of Quantisation”. 1. Identify the expression for Bohr’s second postulate. a) L = b) L = c) L = nh*2p d) L = 2. How did de – Broglie modify Bohr’s postulate? … Read more
This set of Class 12 Physics Chapter 12 Multiple Choice Questions & Answers (MCQs) focuses on “The Line Spectra of the Hydrogen Atom”. 1. What causes spectral lines? a) The transition of electrons between two energy levels b) The transition of electrons between two wavelength ranges c) Magnetic and electric field exiting in an atom … Read more
This set of Class 12 Physics Chapter 12 Multiple Choice Questions & Answers (MCQs) focuses on “Bohr Model of the Hydrogen Atom”. 1. The radius of the Bohr orbit depends on which of the following? a) b) n c) d) n2 2. What is the order of the radius of an electron orbit in a … Read more
This set of Class 12 Physics Chapter 12 Multiple Choice Questions & Answers (MCQs) focuses on “Atoms”. These MCQs are created based on the latest CBSE syllabus and the NCERT curriculum, offering valuable assistance for exam preparation. 1. Which source is associated with a line emission spectrum? a) Electric fire b) Neon street sign c) … Read more
This set of Class 12 Physics Chapter 12 Multiple Choice Questions & Answers (MCQs) focuses on “Alpha-Particle Scattering and Rutherford’s Nuclear Model of Atom”. 1. The atomic number of silicon is 14. Its ground state electronic configuration is a) 1s22s22p63s23p4 b) 1s22s22p63s23p3 c) 1s22s22p63s23p2 d) 1s22s22p63s23p1 2. What is the valence electron in alkali metal? … Read more
This set of Class 12 Physics Chapter 11 Multiple Choice Questions & Answers (MCQs) focuses on “Davisson and Germer Experiment”. 1. Which theory is confirmed by the Davisson – Germer experiment? a) de – Broglie theory b) Newton’s theory c) Einstein’s theory d) Planck’s theory 2. Which of the following is used in the Davisson … Read more
