The current in the coil is 400mA, the energy of the magnetic flux is 0.2 J. Determine the inductance.

To find the required inductance of the used coil, we will use the formula: Wm = L * I ^ 2/2 and L = 2Wm / I2.

The values of the variables: W is the energy of the magnetic field of the current (W = 0.2 J); I – current strength (I = 400 A = 0.4 A).

Let’s make a calculation: L = 2Wm / I ^ 2 = 2 * 0.2 / 0.4 ^ 2 = 2.5 G.

Answer: The inductance of the used coil is 2.5 H.

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