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A silver sphere of radius 1 cm and work ...

A silver sphere of radius 1 cm and work function 4.7 eV is suspended from an insulating thread in free-space. It is under continuos illumination of 200 jnm jwavelength light. As photoelectrons are emitted, the sphere gets charged and acquires a potential. The maximum number of photoelectrons emitted from the sphere is `Axx10^(z)"(where" 1ltAlt10)`. the value of Z is

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