The number of Faraday tubes of flux passing through a surface in an electric field is called

The correct answer is: A. electric flux.

Electric flux is the measure of the electric field lines that pass through a surface. It is calculated by multiplying the electric field strength by the area of the surface. The SI unit of electric flux is the volt-meter (V⋅m).

Electric flux density is the amount of electric flux per unit area. It is calculated by dividing the electric flux by the area of the surface. The SI unit of electric flux density is the volt-meter per square meter (V/m2).

Magnetic flux density is the amount of magnetic flux per unit area. It is calculated by dividing the magnetic flux by the area of the surface. The SI unit of magnetic flux density is the tesla (T).

Electric charge density is the amount of electric charge per unit volume. It is calculated by dividing the electric charge by the volume of the object. The SI unit of electric charge density is the coulomb per cubic meter (C/m3).