A) 4 times the original current
B) 2 times the original current
C) half the original current
D) zero times the original current
Correct Answer: D
Solution :
The minimum frequency of light which can emit photoelectrons from a material is called the threshold frequency of that material. If the frequency of incident light is less than threshold frequency\[({{v}_{0}})\]no photoelectrons are emitted whatever be the intensity of light. When frequency of incident light is halved, its frequency becomes\[\frac{{{v}_{0}}}{2}\]which is less than threshold frequency\[{{v}_{0}}\]. Hence, no photo- electric emission will take place.
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