Two spherical, nonconducting, and very thin shells of uniformly distributed positive charge Q and radius d are located a distance 10d from each other. A positive point charge q is placed inside one of the shells at a distance d/2 from the center, on the line connecting the centers of the two shells, as shown in the figure. What is the net force on the charge q ?

Options

A. `(qQ)/(361 pi epsilon_(0)d^(2))` to the left
B. `(qQ)/(361 pi epsilon_(0)d^(2))` to the right
C. `(362qQ)/(361pi epsilon_(0)d^(2))` to the left
D. `(360qQ)/(361piepsilon_(0)d^(2))` to the right

Answer

A

Explanation

`F=(1)/(4pi in_(0))xx(Qq)/((19/2 d)^(2))+0=(qQ)/(361 pi in_(0) d^(2))`