5.3 Lenz's law Lenz’s law deals with the direction of induced e.m.f. in a conductor. To find out this, it good to know in which direction current will flow using a cell as show below. A coil of known direction of wiring is shown below. In turn, if we plunge each pole of a magnet into and out of the coil; and we get the results shown figures 5.3.1b, 5.3.1c, 5.3.1d and 5.3.1e. The above is generalized by Lenz’s law which states that the direction of the induced e.m.f. is such that it opposes the change causing it. Approach by plugging N pole the end of the coil opposes it with the same pole and vice versa. The direction of the flow in the coil can predicted by Right Hand Grip Rule. This is done by gripping the coil with the thumb pointing N-pole and is perpendicular the fingers. The fingers indicate the flow induced current. On the other hand should it be a straight conductor be considered, fig. 5.3.1f, then employ the Right Hand (Dynamo) Rule which merely calls fo...