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12th Class Physics
Short Questions Preparation
Start Chapter 20 Preparation
12th Class Physics Chapter Wise Preparation
Online Short Questions For Chapter 9 "ICS Part 2 Physics Chapter 20 Short Questions Preparation "
Try The Short Questions For ICS Part 2 Physics Chapter 20 Short Questions Preparation
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Total Questions10
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Available Sets3
Physics - ICS Part 2 Physics Chapter 20 Short Questions Preparation
Question # 1
In which region of electromagnetic spectrum does the following series fall (a)Lyman series (b)Balmer series?
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Ans 1: Balmer series falls in the visible region.Lyman series falls in the ultraviolet region.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1
Question # 1
In which region of electromagnetic spectrum does the following series fall (a)Lyman series (b)Balmer series?
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Ans 1: Balmer series falls in the visible region.Lyman series falls in the ultraviolet region.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2
Question # 1
Write two postulate of Bohr's model of H-atom.
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Ans 1:
- An electron ,bound to the nucleus in an atom,can moved around the nucleus in certain circular orbits without radiating,These orbits are called the discrete stationary orbits.
- Only those stationary orbits are allowed for which orbital angular momentum is equal to an integral multiple mvr=nh/2π.
ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3
Question # 1
How can spectrum of hydrogen contain so many lines,whereas hydrogen atom contain one electron?
- Ans 1: The single electron in hydrogen atom occupies ground state but it can be excited to several states by absorbing energy.During de-excitation ,it can emit several lines of different wavelength.
