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Figure shows two large cylindrical shell...

Figure shows two large cylindrical shells having uniform linera charge densities `+ lambda` and `- lambda`. Radius of inner cylinder is 'a' and that of outer cylinder is 'b'. A charged particle of mass m, charge q revolves in a circle of radius r. Then, its speed 'v' is : (Neglect gravity and assume the radii of both the cylinders to be very small in comparison to their length.)

A

`sqrt((lambda q)/(2pi in_(0) m))`

B

`sqrt((2 lambda q)/(pi in_(0) m))`

C

`sqrt((lambda q)/(pi in_(0) m))`

D

`sqrt((lambda q)/(4pi epsi_(0) m))`

Text Solution

Verified by Experts

The correct Answer is:
A
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