1.

In a photoelectric experiment for 4000 Å incident radiation, the potential difference to stop the ejection is 2 V. If the incident light is changed to 3000 Å, then the potential required to stop the ejection of electrons will be [MP PET 1995]

A.            2 V
B.            Less than 2 V
C.            Zero                                         
D.            Greater than 2 V
Answer» E.


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