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Understanding Inductors How an inductor works? Working of Inductors Fully Explained with 3D Animation.
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Transcript
00:00Understanding Inductors
00:02In this video, we'll discuss inductors.
00:05An inductor is simply a coil of wire that stores energy as a magnetic field.
00:11This magnetic field is produced only when current flows through the inductor,
00:16and its strength depends on the current's magnitude and the number of turns in the coil.
00:21A straight conductor can generate a magnetic field when current flows through it but the field is weak.
00:27However, when the conductor is coiled, each turn adds to the overall magnetic field, creating a much stronger one.
00:35This ability to produce a strong magnetic field is called inductance,
00:40which is the property that allows an inductor to resist changes in current, whether in magnitude or direction.
00:47Consider an inductor in a circuit.
00:49When the circuit is closed, the voltage across the inductor instantly rises to its peak,
00:54but the current increases gradually from zero to its maximum.
00:59This happens because of Faraday's law of induction,
01:02which states that a changing magnetic field induces an electromotive force, EMF, in the conductor.
01:10This EMF opposes the magnetic field that created it, known as back EMF.
01:17The back EMF is directly proportional to the number of turns in the inductor
01:22and the rate of change of the magnetic flux.
01:26In a DC circuit, this effect occurs only when the current changes, such as when the circuit is switched on or off.
01:34At the start, the magnetic field is expanding,
01:37which induces a back EMF that opposes the incoming current, causing the current to lag.
01:43When the magnetic field reaches its maximum strength, it stops expanding and the back EMF disappears,
01:50allowing full current to flow through the inductor.
01:53At this point, the inductor behaves like a simple wire, offering no resistance to the current.
02:00An interesting thing happens when the circuit is opened.
02:03The inductor briefly continues to allow current flow, even after being disconnected from the power source.
02:10This is due to the energy stored in its magnetic field.
02:14As the magnetic field collapses, it induces a back EMF that helps maintain the current flow for a short time.
02:21This is why current lags behind voltage in an inductor.
02:26Hope you learned something new.
02:28Don't forget to like, share, and subscribe.
02:31And click the bell icon to stay updated with future videos.

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