At t = 0, an emf of 500 V is applied to a coil that has an
Question:
(a) Find the energy stored in the magnetic field when the current reaches half its maximum value.
(b) After the emf is connected, how long does it take the current to reach this value?
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A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. The video shows the practical implications of magnetic force around different objects.
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