Recent questions tagged chapter12

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How does the stopping potential applied to a photocell change if the distance between the light source and the cathode of the cell is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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On what factor does the retarding potential of a photocell

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Electron and proton are moving with same speed, which will have more

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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By how much would the stopping potential for a given photosensitive surface goup if the frequency of the incident radiations were to be increased from `4×10^(15) Hz` to `8 × 10^(15) Hz? ` `(h=6.4xx10^(-3)4Js,

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Work function of Na is 2.3eV. Does sodium show photoelectric emission for light on the velocity of

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electron and an alpha particle have the same debroglie wavelength associated with them? How are their kinetic energies related to each

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An α − particle and a proton are accelerated from rest through same potential difference V. find the ratio of de–broglie wavelength associated with

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Photoelectric work function of a metal is 1eV. Light of wavelength `3000A^o` falls on it. What is the velocity of the effected

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The wavelength λ of a photon and debroglie wavelength of an electron have the same value. Show that the energy of the photon is `(2mcλ)/h` times the kinetic energy of electron where m, c, and h have their usual

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Draw a graph showing the variation of stopping potential with frequency of the incident radiations. What does the slope of the line with the frequency axis indicate. Hence define threshold

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If one Mole of a monatomic gas is mixed with 3 moles of a diatomic gas. What is the molecular specific heat of the mixture at constant

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Calculate the difference between two principal specific heats of 1g of helium gas at N. T. P. Given Molecular weight of Helium = 4 and J = 4.186 J/cal and Universal Gas constant, R = 8.314J / mole /

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Why does heat flow from a body at higher temperature to a body at lower

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Can you design heat energy of 100%

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Does the working of an electric refrigerator defy second law of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A Carnot engine absorb `6×10^5` cal at `227^oc` calculate work done per cycle by the engine if it sink is at

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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How does second law of thermodynamics explain expansion of

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Calculate difference in efficiency of a Carnot energy working between:-1) 400K and 350K2) 350K and

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Derive an expression for the work done during isothermal

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Briefly describe a Carnot cycle and derive an expression for the efficiency of Carnot

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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