PHY 2020 Lecture Notes - Lecture 37: Tesla Coil, Inductor, Inductance
Document Summary
Circulation of powerful currents generate a field in one device that will induce a current in a separate device: modern electric toothbrushes use an inductive scheme to charge their batteries. Consider a device that consists of two coils located near each other. A current i1 flows through coil 1 and creates a magnetic field b in the region of space common to the two coils. If we change the current i1 through the firs coils, the flux through coil 2, changes. The other coils, with area a2 feels a flux. This changing of i1 will thus results in a flow of current through coil 2. This process is known as mutual inductance. Example: mutual induction is applied to allow two sets of coils, one long and one smaller, to transform voltages. Solution: assume that the current in n1 is i1, so the magnitude of magnetic field of this solenoid.
