(a) A current induced in one conductor by a variation in the current in a neighboring one; the current produced in the secondary circuit of an induction coil or alternating current converter. (b) The current given by a secondary battery. This terminology is not to be recommended.

In long telegraph lines having terminal grounds or connected to earth only at their ends, potential differences are sometimes observed that are sufficient to interfere with their working and which, of course, can produce currents. These are termed earth-currents. It will be noted that they exist in the wire, not in the earth. They may [...]

1. Two rectilinear currents, the directions of which form an angle with each other, attract one another when both approach to or recede from the apex of the angle. 2. They repel one another, if one approaches and the other recedes from the apex of the angle.

Currents passing through conductors which form an angle with each other.

The currents of electricity assumed by Ampere’s theory to circulate around a magnet. As they represent the maintenance of a current or of currents without the expenditure of energy they are often assumed to be of molecular dimensions. As they all go in the same sense of rotation and are parallel to each other the [...]

A switch or other contrivance for reversing the direction of a current in a conductor.

A current flowing through a rectilinear conductor. The action of currents depending on their distance from the points where they act, their contour is a controlling factor. This contour is determined by the conductors through which they flow.

A typical alternating current is represented by a sine curve, whose undulations extend above and below the zero line. If by a simple two member commutator the currents are caused to go in one direction, in place of the sine curve a series of short convex curves following one another and all the same side [...]

A current of constant direction, but whose strength is constantly varying, so that it is a series of pulsations of current instead of a steady flow.

In the single needle telegraph system the current which deflects the needle to the right.