Inductor Behaves As An Open Circuit

- October 17, 2018

2 the voltage on a capacitor cannot change abruptly. 4 a real nonideal capacitor has a parallel model leakage resistance.

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A fully discharged inductor no current through it initially acts as an open circuit voltage drop with no current when faced with the sudden application of voltage.

Inductor behaves as an open circuit. There is no switching. The leakage resistance may be as high as 100 mw. What is the voltage drop across the inductor.

Now here is where inductors in dc circuits get really interestingif we quickly open the switch and leave it as an open circuit after the inductor has been energized and the magnetic field has formed the magnetic field collapses releasing the stored energy back into the inductor and the inductor becomes a voltage source for the circuit. The capacitor acts as open circuit when it is in its steady state like when the switch is closed or opened for long time. At the instant of switch closure what are the values of i and vl.

We can say the inductor has a role in the transient period but in steady state it behaves as a short circuit in dc supply. Voltage across a capacitor. Initially i 0v vl 20v.

So for dc the f is zero so the impedance is zero. An abrupt change is not possible. A allowed b not allowable.

There si only a potential difference causing the current to increase or decrease. A 20 v dc source is connected to a series rl circuit with a switch. An inductor is not an open circuit as you say at time of switching.

And for the inductor itll behave as a short circuit in its steady state and open circuit when theres a change in the current. A 15mh inductor with a winding rsistance of 10 ohms has a constant direct current of 10ma through it. Inductor are reluctant to change in current.

When the circuit is started at t0 inductor behaves as open circuit so at that time current in the circuit is zero it increases exponentially and reached to steady state. Capacitors and inductors 1 a capacitor is an open circuit to dc. After charging fully to the final level of current it acts as a short circuit current with no voltage drop.

The impedance is 2 pi f l for an inductor.