Lecture 31

InductanceConsider the application of FaradayS Law to a single loop.

Solenoids are referred to as inductors. It in series with a battery and a resistor forms a simple RL circuit.

Analogous to RC case:

Notice the derivative of the loop equation gives:

Rearrangement gives:

For decay case:

Here, the battery is removed.

Loop Equation:

Energy Stored in C and L

Express Energy Stored in terms of B

Energy Density

magnetic

electric

A B

C D

Left Diagram:

Right Diagram:Loop A3B4A:

Loop C(wire)D4C: