A) number of electrons emitted is a quarter of the initial number
B) each emitted electron carries one quarter of the initial energy
C) number of electrons emitted is half the initial number
D) each emitted electron carries half the initial energy
Correct Answer: A
Solution :
[a] Power \[\propto \] no. of electrons emitted (N) \[P\propto \frac{1}{{{r}^{2}}}\]\[\Rightarrow \]\[N\propto \frac{1}{{{r}^{2}}}\]
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