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What happens when inductor current is suddenly disrupted?
When you force a sudden change on an inductor (like open a nearby switch), the one thing the inductor keeps constant is its current. (It’s voltage can change abruptly, but its current will not.) Because the current can’t/doesn’t change abruptly, the same current is still flowing down right after the switch opens.
What happens when inductor is disconnected?
When your inductor is suddenly disconnected from its source, the inductor now becomes the source and it wants to keep the current flowing in the same direction it was going; ie the current does not reverse! You can see this visually by connecting a scope across the inductor.
Does an inductor stop current?
Note the polarity of the voltage with regard to the direction of current. If a source of electric power is suddenly applied to an unmagnetized inductor, the inductor will initially resist current flow by dropping the full voltage of the source. Eventually the current reaches a maximum level, and stops increasing.
What happens to current in inductor?
The current in an inductor cannot change instantaneously because it implies an infinite voltage will exist, which isn’t going to happen. This reluctance to change is because of the energy stored in the inductor’s magnetic field. The current in an inductor does not (will not) change instantaneously.
Why do inductors resist changes in current?
Inductor Symbol But unlike a Capacitor which oppose a change of voltage across their plates, an inductor opposes the rate of change of current flowing through it due to the build up of self-induced energy within its magnetic field.
What happen to energy store in the inductor when the switch is turn off?
The energy stored in the inductor is dissipated in this spark. Summary: An inductor doesn’t “want” the current to be interrupted and therefore induces a voltage high enough to make the current continuing.
Can an inductor be used as a battery?
If the current is constant the inductor has no change to oppose and so it doesn’t act like a battery at all. In that case it just acts as a resistor. Often the resistance of the inductor is negligible compared to that of other resistors in the circuit and we can treat the inductor just as a wire.