Define Electric Power and write its SI unit

Define electric power and give its unit.

Define electric field. Write its SI units. Write the magnitude and direction of electric field due to an electric dipole of length '2a' at the mid-point of the line joining the two charges.

Define power of a lens and write its SI unit.

Define electric flux. Write its SI unit. It a scalar or a vector quantity?

Define electric flux. Write its SI unit. A charge q is enclosed by a spherical surface of radius R. If the radius is reduced to half, how would the electric flux through the surface change ?

Define electric flux. Write its SI unit. "Gauss 'law in electrostatic is true for any closed surface, no matter what its shape or size is" Justify this statement with the help of a suitable example.

Define power and its SI unit.?

Define electric dipole moment. Write its SI unit ?

Define power of a lens and write its unit

Define acceleration and state its SI unit.