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Two long concentric cylindrical conduct...

Two long concentric cylindrical conductors of radii a and b `(b lt a)` are maintained at a potential difference V and carry equal opposite current I. Show that an electron with a particular velocity u parallel to the axis may travel undeviated in the evacuated region between the conductors.

A

`(4piV)/(mu_(0)Iln((b)/(a)))`

B

`(2piV)/(mu_(0)Iln((a)/(b)))`

C

`(2piV)/(mu_(0)Iln((b)/(a)))`

D

`(8piV)/(mu_(0)Iln((a)/(b)))`

Text Solution

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The correct Answer is:
B
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