Supose a gaussian surface does not include any net charge. Does it necessarily mean that E is equal to zero for all points on the surface?

A closed lop of B is produced by a changing electric field l.Does it necessarily mean that (dB)//(dt) are non - zero at all the points on the loop and in the area enclosed by the loop?

A closed loop of B is produced by a changing electric field. Does it necessary mean that E and dE//dt are non-zero at all points on the loop and in the area enclosed by the loop?

An electric flux of -6xx10^3Nm^2C^-1 passes through a spherical gaussian surface of radius 10 cm due to a point charge placed at the centre. What is the charge enclosed by the gaussian surface.

If you find closed loops of B in a region in space, does it necessarily mean that actual charges are flowing across the area bounded by the loops?

Show that the normal component of electrostatic field has a discontinuity from one side of a charged surface to another given by (E_2 - E_1) hatn= (sigma)/(epsilon_0) where hatn is a unit vector normal to the surface at a point and is the surface charge density at that point. (The direction of hat n is from side 1 to side 2.) Hence show that just outside a conductor, the electric field is sigma hatn // epsilon_0

A charge Q is given to a conducting cone. Is electric potential at all the points on the surface of the cone same?

A spherical rubber balloon carries a charge that is uniformally distributed over its surface. As the balloon is blown up and increase in size, how does the total electric flux coming out of the surface change? Give reason.