In a coil with an inductance of 0.6 g, the current is 20A. How will the energy of the magnetic field change if the current strength is halved.
Let us recall the formula for the energy of the magnetic field, given to us in the textbook of the 10th grade of the basic course:
W = L * I ^ 2/2
W2 = 1/4 * L * I ^ 2/2
Answer: Will decrease by 4 times
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