Figure shows the cross-sectional view of the hollow cylindrical conductor with inner radius `'R'` and outer radius `'2R'`, cylinder carrying uniformly distributed current along it's axis. The magnetic induction at point `'P'` at a distance `(3R)/2` from the axis of the cylinder will be

Options

A. Zero
B. `(5mu_(0)i)/(72piR)`
C. `(7mu_(0)i)/(18pi R)`
D. `(5mu_(0)i)/(36pi R)`

Answer

4

Explanation

`B=(mu_(0)i)/(2piR)((r^(2)-a^(2))/(b^(2)-a^(2)))` and `r=(3R)/(2),a=R,b=2R`