Magnetic Field

Step 1: Understand the Magnetic Energy Formula The magnetic energy stored in an inductor (or coil) is given by: where is the inductance of the coil (in henries, H), and is the current (in amperes, A). To find , we need to calculate .

Step 2: Calculate the Inductance The inductance of a coil is related to the magnetic flux linkage by: where: - is the number of turns, - is the magnetic flux per turn, - is the current. Rearranging for : Given: - turns, - Wb per turn, - A. Substitute the values:

Step 3: Calculate the Magnetic Energy Now, use the magnetic energy formula: Substitute and :

Step 4: Final Answer The magnetic energy associated with the coil is: