All Flashcards
What is inductance (L)?
The measure of a conductor's resistance to changes in current.
What is induced EMF?
The electromotive force generated in an inductor due to a changing magnetic flux, opposing the change in current.
Define magnetic permeability.
A measure of a material's ability to support the formation of magnetic fields within itself.
What is the unit of Inductance?
Henry (H)
What is a Solenoid?
A coil of wire, often cylindrical, used to generate a magnetic field when current passes through it; designed for significant inductance.
What happens when the number of turns in a solenoid increases?
The inductance of the solenoid increases.
What happens when the length of a solenoid increases?
The inductance of the solenoid decreases.
What happens when the cross-sectional area of a solenoid increases?
The inductance of the solenoid increases.
What happens when the current through an inductor changes abruptly?
A large voltage spike (induced EMF) is generated, opposing the change in current.
What happens when an inductor is placed in an AC circuit?
The inductor opposes changes in current, causing a phase shift between voltage and current and filtering signals.
What happens when the magnetic permeability of the core of a solenoid increases?
The inductance of the solenoid increases.