Lenz's law applies equally to both single loops and coils, with the key distinction being that a coil consists of multiple loops. When a magnetic field interacts with a coil, the induced electromotive force (emf) is the sum of the emfs from each individual loop, resulting in a total voltage that is N times greater than that of a single loop. Consequently, if the only resistance is external to the wire, the current in the coil will also be N times the current in a single loop. Understanding the relative positions of the magnetic poles and the coil is crucial for determining the direction of the induced current.
PREREQUISITESStudents of physics, electrical engineers, and anyone interested in understanding electromagnetic induction and its applications in coils and circuits.
A coil is just multipe loops. If you understand what happens for a single loop, it happens N times as much for a coil of N turns. The direction of the current in each loop of the coil is the same as for a single loop. The induced emf is additive, so the total voltage is N times the voltage of a single loop. If the only resistance is external to the wire, the current will also be N times the current for a single loop.Werg22 said:I only understand Len'z law for a current induced in a single loop... however I don't for in a coil... What does the relative poisition of the manetic poles of the magnet and the coil respectively has to do with the direction of the current?