Electromagnetic Fields and Waves, 3rd Edition by Pearson

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EXAMPLE 5.95

A long solenoid with length l and radius ρ consists of N turns of wire and a current I passes through the coil. Find the energy stored in the system.

SOLUTION

The magnetic field inside the solenoid is

The magnetic energy density within the solenoid is

The total magnetic energy stored inside the solenoid is

where πρ²l is the volume within the solenoid.

EXAMPLE 5.96

Calculate the energy stored in the magnetic field of the ...

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