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