29/03/2020 Quantum Physics(Senior Class Physics Study by Topics) 29/03/2020 0Comments by Gate Academy Welcome to your Quantum Physics(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. The emission of electron from the surface of a metal is called? X-ray Spectra Compton Blackbody Radiation The photoelectric effect 2. Which one of the following best shows the variation with kinetic energy E of the de Broglie wavelength λ associated with a particle?I II III IV IV III I II 3. Who discovered the photoelectric effect? Micheal Faraday Isaac Newton Hertz Heinrich Hertz 4. The quantum mechanical model describes electrons as: Particles Particles with wave-like properties Waves Small, hard spheres 5. A wavefunction: Is the differential equation used to describe the structure of an atom. Is the differential equation used to describe the structure of an electron. Is the solution to a differential equation known as a wave equation that describes the structure of an electron. Is the solution to a differential equation known as a wave equation that describes the structure of an atom. 6. An α-particle having a de Broglie wavelength λi collides with a stationary carbon nucleus. The α-particle moves off in a different direction as shown below.After the collision, the de Broglie wavelengths of the α-particle and the carbon nucleus are λf and λc respectively. Which of the following is a true statement related to the de Broglie wavelengths? λi = λc λi < λf λi > λf λf = λc 7. The different types of subshells and corresponding number of orbitals is: S:2, p:6, d:10, f:14 S:7, p:5, d:3, f:1 S:1, p:3, d:5, f:7 N:1, l:0, m:0 8. When electrons of suitable energy travel through a thin layer of graphite, a pattern of concentric circles is produced on a screen.The production of this pattern is evidence for The nuclear model of the atom. The existence of X-rays The wave nature of the electron The particle nature of the electron. 9. The energy required by an electron to escape from the surface of a given metal is called? Threshold Effect Work Function The photoelectric effect Threshold frequency 10. The momentum and the position of a particle cannot simultaneously be measured with complete certainty, is based on what assumption? The uncertainty principle Relativity Theory Particle duality Plank's theory 11. Which of the following laws was the first quantum theory in physics? Lewi's Law Planck's Law Faraday's Law Uncertainty Principle 12. The electromagnetic radiation emitted from the surface of an object due to the object's internal energy is known as? Photon Spectra Emission Nuclear Radiation Thermal Radiation 13. The principle quantum number is related to: The shape of the orbital The average distance of the most electron-dense regions from the nucleus The number of electrons The spatial orientation of the orbital 14. The spin quantum number (ms) can have a value of: +1, -1 -1/2, -3/2 0, +1 -1/2, +1/2 15. The angular momentum quantum number is related to n by ___, and describes: (n+1), the shape of the orbital (n-1), the shape of the orbital (n+1), the spatial orientation of the molecule (n-1), the spatial orientation of the molecule 16. Quantum mechanics is called the science of what? The colossal The very small The very large The big 17. The ability of an object in quantum theory to be in more than one quantum state at the same is know as? Nonlocality Superposition Decoherence Wave-particle duality 18. Quantum physics explains the interaction between? Atomic and Molecules Matter and energy Energy Energy and Nuclear 19. Who predicted that matter acts as a wave? Louis de Broglie Rutherford Heinrich Hertz Heisberg 20. The magnetic quantum number describes the: Spatial orientation of the orbital. Number of electrons. Shape of the orbital. Average distance of the most electron-dens regions from the nucleus. 21. There are ___ types of quantum numbers. 7 4 2 5 22. Heisenberg’s Uncertainty Principle states that the ___ and ___ of an electron cannot be known simultaneously. Position, charge Momentum, speed Position, momentum Position, mass 1 out of 22 Time is Up! Time's up