In a photoelectric effect experiment, a point source of light of power 40W emits mono-energetic photons...

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In a photoelectric effect experiment, a point source of light of power 40W emits mono-energetic photons of wavelength , that can just exit photoelectrons from an isolated metallic sphere of radius 1 cm, placed at a distance of 1 km from the light source. Now, three other sources of wavelength A,A3 and 4 which are emitting the same number of photons as that of 2 brought near the source of 2. Assume photo efficiency of 10 (Take 2,4960 , 2 = 4133.33 , A = 5000 , A4 = 7200 and hc-12.400 eV - ) (A) (B) (C) (D) Number of photoelectrons emitted from the sphere per second is 2.5x10 The potential of the sphere when emission of photoelectron stops is 0.8 V. The potential of the sphere when emission of photoelectrons stops is 0.5 V. The time after which the emission of photoelectrons will stop is 1.39x10 sec. In a photoelectric effect experiment, a point source of light of power 40W emits mono-energetic photons of wavelength , that can just exit photoelectrons from an isolated metallic sphere of radius 1 cm, placed at a distance of 1 km from the light source. Now, three other sources of wavelength A,A3 and 4 which are emitting the same number of photons as that of 2 brought near the source of 2. Assume photo efficiency of 10 (Take 2,4960 , 2 = 4133.33 , A = 5000 , A4 = 7200 and hc-12.400 eV - ) (A) (B) (C) (D) Number of photoelectrons emitted from the sphere per second is 2.5x10 The potential of the sphere when emission of photoelectron stops is 0.8 V. The potential of the sphere when emission of photoelectrons stops is 0.5 V. The time after which the emission of photoelectrons will stop is 1.39x10 sec.

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