What is an electric dipole?

What is an electric fuse? How does it protects devices and appliances from damage?

Distinguish between magnetic dipole and electric dipole.

What is the net electric flux through a closed surface surrounding an electric dipole? Derive the expressions for electric field intesity both inside and outside a uniformly charged spherical cell. What is the total enclosed by a closed surface if the electric flux entering and leaving the surface are 20000N/Cm^2 and 30000N/C m^2 respectively.

What is an electric charge ?