A solenoid with 2100 turns, an area of 10 cm², and a length of 30 cm carries a current of 4.0 A. Calculate the magnetic energy stored in the solenoid using the formula 1/2 LI².
b) Divide your answer from part (a) by the volume of the solenoid to find the magnetic energy per unit volume in the solenoid.
c) Find the magnetic field strength (B) in the solenoid.
Compute the magnetic energy density using the formula Um = B²/2μ₀.
Compare your answer with the result from part (b).
