NEET Practice Questions

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NEET, 2011

An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photo-sensitive material having work function 2.75 eV. If the stopping potential of the photo-electron is 10V,the value of n is 

(a)3                                    (b)4

(c)5                                    (d)2