A particle of mass m and charge q is attached to a light rod oflength L. The rod cau rotate freely in the plane of paper about the other end, which is hinged at P, the.entire assembly lies in an uniform electric field E acting in the plane of paper ·as shown in the figure-. The rod is released from rest when it makes an angle 9 with the electric field direction. Determine the speed oft he particle when the rod becomes parallel to the electric field:

Options

A. `((2qEL(1-cos theta))/(2m))^(1//2)`
B. `((2qEL(1-sin theta))/(m))^(1//2)`
C. `((qEL(1-cos theta))/(2m))^(1//2)`
D. `((2qELcos theta)/(m))^(1//2)`