Chapter 31-Inductance

What is self-induction?

The process by which a changing current in a circuit induces an emf in the same circuit

What is inductance?

A measure of a circuit's opposition to changes in current, denoted by L, with units of henry (H)

Formula for self-induced emf?

Inductance of a solenoid?

Energy stored in an inductor?

Magnetic energy density?

Growth of current in an RL circuit?

Decay of current in an RL circuit?

What does an inductor do in an RL circuit?

Opposes changes in current, causing it to grow or decay exponentially.

What is mutual inductance?

The property where a changing current in one coil induces an emf in a nearby coil.

Formula for mutual inductance?

Induced emf in a secondary coil due to mutual inductance?

Induced emf in a secondary coil due to mutual inductance?

What happens in an LC circuit?

Energy oscillates between the electric field of the capacitor and the magnetic field of the inductorAngular frequency of an LC circuit?

Angular frequency of an LC circuit?Charge on a capacitor in an LC circuit?

Charge on a capacitor in an LC circuit?

Current in an LC circuit?

What is the behavior of an RLC circuit?

Combines oscillations (LC circuit) with damping due to resistance.

Formula for damped oscillations in an RLC circuit?

What is the damping factor α in an RLC circuit?

What is the critical resistance in an RLC circuit?

How is inductance similar to inertia in mechanics?

Both oppose changes in motion (current in circuits or velocity in mechanics)

What is the analogy for energy storage in an LC circuit?

Similar to a block-spring system, where energy oscillates between potential energy (spring) and kinetic energy (block).

What is the role of inductance in traffic light systems?

The inductance of a loop buried in the road changes when a car is present, signaling the light to change

How does wireless charging use mutual induction?

A changing current in a coil generates an emf in a nearby coil, transferring energy wirelessly.