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ELECTRONIC
COMPONENTS - INDUCTORS |
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Just as the example of the boat was
used to explain the growth of current in a circuit, it can also be
used to explain current decay.
When the force applied is removed, the boat still continues to move
through the water for a while, eventually coming to a stop. This is
because energy was being stored in the inertia of the moving boat.
After a period of time, the friction of the water overcomes the inertia
of the boat, and the boat stops moving.
Just as inertia of the boat stored energy, the magnetic field of an
inductor stores energy. Because of this, even when the power source
is removed, the stored energy of the magnetic field of the inductor
tends to keep current flowing in the circuit until the magnetic field
collapses. |
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