Physics question and answers for October 15, 2023
- Q Which of the following figures represent the variation of particle momentum and the associated de Broglie wavelength o P 2
- Q xplain the absorption process in LASER Derive the mathematical expression for Einstein s Co efficient and its significance 3 7 Once you upload files from your second device click on...
- Q The activity of a radioactive sample moving with velocity V is given by R R o e 2t A detector at a distance from the sample detects number of counts...
- Q A photo sensitive plate p 1 2 eV is placed at 200 cm from a point source of light of 4 8 x 10 7 m and a power output...
- Q Threshold wavelength for photoelectric emission from a metal surface is 5200 A Photoelectrons will be emitted when this surface is illuminated with monochromatic radiation from 1 1 W IR lamp
- Q Photoelectric effect is observed from a metal surface when light of frequencies 3x10 4 Hz and 2x10 4 Hz is incident If the maximum kinetic energies of the photoelectrons are...
- Q In a photelectric experiment measurement s hows that all the ejected electrons have nonz ero kinetic energy What can you say about th e photelectric current 1 Photo electric curr...
- Q In a Compton experiment the frequency of an incident photon is 5 1016 Hz Calculate the de Broglie wavelength of the scattered electron when the scattering angle of the photon...
- Q If total energy transferred to a surface in time t by electromagnetic waves is U then magnitude of tota momentum delivered to this surface for complete absorption is P 00...
- Q experiment measurement shows that all the ejected electrons have nonzero kinetic energy What can you say photelectric current about the Cannot predict the state of photoelectric current Photelectric current is...
- Q 10 The stopping potential for photoelectrons ejected from a photosensitive material d function 1 6 eV when it is radiated by photons of energy 2 4 eV is 10 A...
- Q The visible spectrum of electromagnetic wave approximately which spans between 300 nm to 800 nm falls on a metallic surface The work function for this metallic surface is 2 40...
- Q 5 Plates A and B are a part of a photoelectric cell bearing a separation of 5 cm between each other The plates are connected through a galvanometer in absence...
- Q 31 The angular momentum of an electron in the nth orbit is given by 1 nh 2 h 2m 3 nh a 4 n h
- Q 3 The given graph shows the variation of frequency of incident radiation with the maximum kinetic energy of the electrons emitted from the surface of photo sensitive material Kmax V...
- Q SolveLancer Test Which of the following statement is incorrect 1 Kg emission has higher wavelength and energy than k II First line of Lyman series has energy times energy of...
- Q Example 7 A tiny glass sphere of mass 10 8 g and 0 02 mm diameter can be kept floating in mid air supported only by a beam of laser...
- Q When radiation of wavelength A is incident on a photo sensitive metallic surface the stopping potential is 3 6 volt If the same surface is illuminated with radiation of double...
- Q Observe the current v s voltage graphs of two photocells receiving same intensity of a monochromatic beam You may consider the plate area receiving the light to be same Now...
- Q Example 8 The potential energy of a simple harmonic oscillator of mass m and oscillating with an angular frequency w is V x mw x a Write the Schr dinger...
- Q A photo electric cell is shown in the figure The emitter plate cathode is made of copper o 4 7 eV and emitter is illuminated by a source of monochromatic...
- Q 4 A photon collides with a stationary hydrogen atom in ground state inelastically Energy of the colliding photon is 10 2 eV After a time interval of the order of...
- Q Example 5 A crystal has some negative ion vacancies each containing one electron Treat these electrons as moving freely inside a volume whose dimensions are of the order of lattice...
- Q d Tangent to the electric field at every point e Equal to the electric field at every point Problem 11 Show Work to get credit 15 points To start a...
- Q In the photoelectric effect current is produced immediately even with dim light This implies that a electrons need time to absorb energy in order to be ejected Ob electrons do...
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