An infinitely long positively charged straight thread has a linear charge density 
. An electron revolves along a circular path having axis along the length of the wire. The graph that correctly represents the variation of the kinetic energy of electron as a function of radius of circular path from the wire is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Electric field E at a distance r due to infinite long wire is 
Force of electron 
This force will provide required centripetal force
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