A hemisphere is uniformly charged positively. The electric field at a point on a diameter away from the centre is directed a) perpendicular to the diameter b) parallel to the diameter c) at an angle tilted towards the diameter d) at an angle tilted away from the diameter
If the point is on a diameter away from the center and a uniformly positive charged hemisphere is there, the electric field component parallel to diameter will be canceled out. And perpendicular components will remain. So, an electric field will be perpendicular to the diameter at a point away from the center on diameter.
