AIPMT PRELIMS2003Physics-Modern Physics
AIPMT PRELIMS 2003 Physics Photoelectric Effect MCQ Question
Type: MCQ-conceptual-Medium-Class 12
A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2m then -
A
each emitted electron carries one quarter of the initial energy
B
number of electrons emitted is half the initial number
C
each emitted electron carries half the initial energy
D
number of electrons emitted is a quarter of the initial number
Correct Answer
Option D
Detailed Explanation
The intensity of light decreases with the square of the distance, so at 2m, the intensity is one-fourth, reducing the number of emitted electrons to a quarter.
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