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Electronics and Communication Engineering - Exam Questions Papers - Discussion

Discussion Forum : Exam Questions Papers - Exam Paper 1 (Q.No. 21)
Exam Questions Papers
21.
Consider the following
  1. Maximum energy of electrons liberated photoelectrically is independent of light intensity
  2. Maximum energy of electrons liberated photoelectrically varies nonlinearly with frequency of incident light.
(1) is true and (2) is false
(1) and (2) both are true
(1) is false and (2) is true
(1) and (2) both are false
Answer: Option
Explanation:

Statement (ii) is false because maximum energy of photons varies linearly with frequency of incident light. It can be shown as follows :

F1 > F2 > F3

j = light intensity = constant

Photocurrent Vs Anode voltage with frequency and incident light as a parameter.

The light intensity is constant.

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