A small spherical insulator of mass 8.80 10-2 kg and charge q1= +0.400 µC is hung by a thin wire of negligible mass. A charge q2= -0.700 µC is held 0.150 m away from the sphere and directly tothe right of it, so the wire makes an angle ? with the vertical(see the figure).
(a) Find the angle ?. ° (b) Find the tension in the wire. N
