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Consider the graph between stopping potential V0 versus frequency of incident light (f) shown here for two different metals.

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If work function of metal. A is k times the work function of metal B, what is the relation between θ1 and θ2 ? 

Important Questions on Dual Nature of Radiation and Matter

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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>EXERCISE 11.2>Q 9
In a photoelectric emission the stopping potential is plotted against the frequency v of incident light. The resulting curve is a straight line which makes an angle θ with the ν-axis. Then tanθ will be equal to ( ϕ= work function )
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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>EXERCISE 11.2>Q 10
The stopping potential are V1 and V2 with incident lights of wavelengths λ1 and λ2 respectively. Then V1-V2 equal to
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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>EXERCISE 11.2>Q 11
When a certain metallic surface is illuminated with light of wavelength λ, the stopping potential is 3V0. When the same surface is illuminated with light of wavelength 2λ, the stopping potential is V0. The threshold wavelength for this surface is
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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>EXERCISE 11.2>Q 12
A proton and an α -particle are accelerated through the same potential difference. The ratio of de-Broglie wavelength of the proton to that of the α particle will be
 
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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>EXERCISE 12.2>Q 11
The work functions of silver and sodium are 4.6 and 2.3 eV, respectively. The ratio of the slope of the stopping potential versus frequency plot for silver to that of sodium is
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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>EXERCISE 12.2>Q 12
In a photoelectric experiment, a parallel beam of monochromatic light with the power of 200 W is incident on a perfectly absorbing cathode of work function 6.25 eV. The frequency of light is just above the threshold frequency so that the photoelectrons are emitted with negligible kinetic energy. Assume that the photoelectron emission efficiency is 100 %. A potential difference of 500 V is applied between the cathode and the anode. All the emitted electrons are incident normally on the anode and are absorbed. The anode experiences a force F=n×10–4 N due to the impact of the electrons. The value of n is? Mass of the electron me=9×10-31 kg and 1.0 eV=1.6×10–19 J.
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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment Set-2>Q 1
The photo-electrons emitted from a surface of sodium metal are such that :-
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Gamma Question Bank for Engineering Physics>Chapter 27 - Dual Nature of Radiation and Matter>Assignment Set-2>Q 2
A photo cell is receiving light from a source placed at a distance of 1 m. If the same source is to be placed at a distance of 2 m, then the ejected electron