A monochromatic source having wavelength $$2480A0$$ is used to irradiate a metallic sphere of radius $$2$$ m and work function $$3eV$$. If the emission of photoelectrion is stopped after sometime then charge on the sphere at that instant is

Question

A monochromatic source having wavelength $$2480A0$$ is used to irradiate a metallic sphere of radius $$2$$ m and work function $$3eV$$. If the emission of photoelectrion  is stopped after sometime then charge on the sphere at that instant is

Infinity Learn · Accepted Answer

energy of the incident photon is $$124002480=5$$ eVwork function $$3$$ eV. so according to Einstein's equation  hÎ½$$=W+$$ eVs      $$eVs=$$ $$2eV$$  stopping potential will be  $$2V$$  when the potential of the sphere becomes $$2$$ V electron emission is stopped   potential of the sphere   $$V=q4$$ÏÎµ$$0r=2$$ V   q $$=8$$ÏÎµ$$r=16$$ÏÎµ$$0$$

A monochromatic source having wavelength 2480 $\overset{0}{A}$ is used to irradiate a metallic sphere of radius 2 m and work function 3eV. If the emission of photoelectrion is stopped after sometime then charge on the sphere at that instant is

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A monochromatic source having wavelength 2480A0 is used to irradiate a metallic sphere of radius 2 m and work function 3eV. If the emission of photoelectrion is stopped after sometime then charge on the sphere at that instant is

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A monochromatic source having wavelength 2480 $\overset{0}{A}$ is used to irradiate a metallic sphere of radius 2 m and work function 3eV. If the emission of photoelectrion is stopped after sometime then charge on the sphere at that instant is