An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a surface normally. The incident current is 
and if the electrons come to rest on striking the surface the force on it is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Energy 
joule
Number of electron striking per second
Force 
change of momentum per second
newton
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