1.

In a photoelectric cell, the wavelength of incident light is changed from 4000Å to 3600Å. The change in stopping potential will be:

Answer»

0.14 V
0.24 V
0.35 V
0.44 V

Solution :`eV_(S)=HV-phi_(0)`
`eV_(s)=hv.- phi_(0)`
`:.e(V_(s)-V_(s))=H(v.-v)`
`:.V_(s).-V_(s)=(h)/(c)(v.-v)=0.35V`


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