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Inductors as Circuit Elements. Inductors oppose variations in the current through a circuit. -In DC-circuit, L helps to maintain a steady current (despite fluctuations in applied emf). In AC circuit, L helps to suppress fast variations in current.
Inductance. Text sections 32.1 - 32.3. Practice: Chapter 32, Objective Questions 2, 6 Conceptual Questions 2, 10 Problems 9, 13, 14, 39. A variable power supply is connected to a coil. The current in the coil creates a magnetic field. What happens when the power supply dial is turned down, reducing the supply current?
Physically, the inductance L is a measure of an inductor’s “resistance” to the change of current; the larger the value of L, the lower the rate of change of current. Example 11.2 Self-Inductance of a Solenoid Compute the self-inductance of a solenoid withN turns, length l, and radius R with a
Modeling: Any physical device that involves a coil of wire can be modeled using inductance. An obvious example is a motor, whose windings have an inductance. More generally, a device with a current-induced magnetic field that interacts like an inductor will have inductance. 6.2 The Capacitor Circuit symbol
Basis of the electrical circuit element called an inductor. Energy is stored in the magnetic field of an inductor. There is an energy density associated with the magnetic field. Mutual induction. An emf is induced in a coil as a result of a changing magnetic flux produced by a second coil.
Inductance is the characteristic of an electrical conductor that OPPOSES CHANGE in CURRENT. The symbol for inductance is L and the basic unit of inductance is the HENRY (H). One henry is equal to the inductance required to induce one volt in an inductor by a change of current of one ampere per second.
Inductance: Mutual Inductance and Self-Inductance. Inductance is the magnetic analog of capacitance in electric phenomena. Like capacitance, inductance has to do with the geometry of a magnetic device and the magnetic properties of the materials making up the magnetic device. The capacitance C of an electric device is associated with the ...
