A small sphere of mass m = 2gm having charge Q = 5µC is suspended using an insulated string as shown in figure. The angle θ made by the sphere with vertical if it is placed in an electric field of magnitude 2000v/m towards right is:
(1) tan-1(5)
(2) tan-1(0.5)
(3) tan-1(2)
(4) tan-1(0.2)
