# How to use *Line-integral* in a sentence

The total magnetic induction or flux corresponds to the current of electricity (practically measured in amperes); the induction or flux density B to the density of the current (number of amperes to the square centimetre of section); the magnetic permeability to the specific electric conductivity; and the

**line integral**of the magnetic force, sometimes called the magnetomotive force, to the electro-motive force in the circuit.This sum, or integral, is called the "

**line integral**of electric force" or the electromotive force (E.M.F.) along this line.The fundamental fact connecting electric currents and magnetic fields is that the

**line integral**of magnetic force taken once round a conductor conveying an electric current is equal to 4 7r-times the surface integral of the current density, or to 4 7r-times the total current flowing through the closed line round which the integral is taken (see Electrokinetics).Advertisement