Determine the inductance of the coil, if the energy of the magnetic field is 2J during the passage of a current of 4A.

univerkov | May 18, 2021 | education

Data: I (value of the current that passes through the coil) = 4 A; W (magnetic field energy of a given coil) = 2 J.

We express the inductance of this coil from the formula for calculating the energy of the magnetic field: W = L * I ^ 2/2, whence L = 2 * W / I ^ 2.

Let’s perform the calculation: L = 2 * 2/42 = 0.25 H.

Answer: The inductance of the coil is 0.25 H.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.