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Why is it inductance does not affect current in a Direct Current circuit?
Wiki User
∙ 13y ago
When an inductor is first activated (when current begins), the flow of charge begins to set up a magnetic field in and around the coil. Since a magnetic field is a real thing, a kind of distortion of spacetime, the act of creating a magnetic field requires energy, and the inductor harvests the energy of the electrons to accomplish this. As a result, the electrons slow, and the inductor can be said to 'resist changes in current' by harvesting and storing energy.
Naturally, there is a maximum magnetic field associated with any voltage, just as there is a maximum wake that can be generated by a ship moving at a given speed. When the inductor is 'fully magnetized,' when the magnetic field of the inductor is as large as the given current can possibly support, it stops harvesting energy from the circuit and simply holds on to the steady magnetic field that it has created. If the voltage should decrease, the magnetic field begins to collapse, depositing that energy back into the electrons, speeding them along. Thus, again, an inductor 'resists changes in current' by discharging energy.
In conclusion, inductors create magnetic fields for energy storage, and they have a maximum storage of energy for a given voltage. In a 'DC circuit,' the inductor has had sufficient time to build up it's storage of energy and no longer harvests energy from the stream of electrons. It is 'full.'
This also explains why the impedance of an inductor is said to be low at low frequencies, where the inductor has time to charge and discharge itself to keep up with the slowly changing voltages, and why that impedance is high at high frequencies, where the inductor is racing to keep up with the changes, constantly harvesting and spitting back energy.
Wiki User
∙ 13y ago
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If an inductor and a switch are connected in parallel through which the current will flow in an AC circuit?
A:The inductor does not allow ac signal to pass through. It blocks ac and passes dc. If the switch is open, then the ac signal wont pass. If the switch is closed, then the ac signal will pass through the switch.AnswerIt is incorrect to say that an inductor 'does not allow' the passage of an alternating current. An a.c. current will pass through an inductor, although the inductor will limit the value of that current due to the inductor's inductive reactance. Inductive reactance, which is expressed in ohms, is directly-proportional to the inductance of the inductor and to the frequency of the supply. The value of the current is determined by dividing the supply voltage by the inductive reactance of the inductor.If the switch is connected in parallel with the inductor, then closing the switch will apply a direct short circuit across the inductor, and the resulting short-circuit current will cause the circuit's protective device (fuse or circuit breaker) to operate.
What converts an alternating current to diredt current?
Alternating Current can be converted to Direct Current by using a DC Converter which contain a Bridge Circuit , a Capacitor and if needed a Transformer.CommentA 'DC converter' is normally called a rectifier.
Whether alternating current or direct current is safer?
Well, voltage and current levels being identical, alternating current would be safer. It does not spend 100 percent of its time at peak voltage, therefore the average power in case of an electric shock is lower than that of direct current, which is 100 percent. This lesser average may allow some time to detach from the circuit and may not cause such catastrophe to the body.
What is the function of diodes?
The Basic Function of Diode is to act as a switch. when it is ON(forward biased)it will allow the current to flow through itself by offering a low impedance in the circuit. When it is OFF ( Reverse Biased)it will not allow the current to pass through itsel by putting a high impedance in the circuit. A diode can also be used as a clamp, and as a detector (mixer) in an a.m. receiver.
Can a non polarized capacitor be connected to a direct current circuit?
Yes, you can connect a polarized capacitor to a direct current. Make sure you get your polarization is correct.A non polarized capacitor can be connected in a DC circuit as well. "Non Polarized" just means it does not matter which side of the capacitor is positive. If you attempt to connect a polarized capacitor in a DC circuit backwards, you will know when the capacitor explodes.
Is noise is a alternate current or direct current in a circuit?
alternate current
A circuit carrying current in one direction is called a?
Direct current circuit.
Is the continuous flow of charge in a circuit called direct current?
Direct Current
What is the continuous loop that an electric current flows through?
DC = direct current.
Advantages and disadvantages of polyphase circuit?
fewer ripples in a direct current when alternating is converted to direct current
How the frequency relates with an inductor in a dc supply?
This question is nonsense because a dc supply has no "frequency".In any circuit supplied by direct current, the current always flows in the same direction from the point in time when the current is switched on until the point in time when it is switched off.Comparing a circuit that has both resistance and inductance with a circuit that only has resistance:Until a steady-state level of current flow has been reached from the point in time when the current is switched on, the current will rise at a slower rate in the circuit that has inductance compared with the circuit that only has resistance, because the inductance impedes the build-up of current.Then, when the current is switched off, the flow of current will stop instantly in the circuit which only has resistance but in the circuit that has both resistance and inductance, the sudden drop in current will cause a high voltage potential to be developed across the inductor which will dissipate slowly back down to zero through its own resistance.However, if a spark-gap is connected into the circuit across the winding of the inductor - and its inductance is sufficiently large and the spark-gap is sufficiently small - when the current is switched off the high voltage potential across the inductor will generate a spark to appear across the spark-gap that will "zap" the high voltage almost instantly. That is the principal of operation of the spark-ignition coil used to ignite the gas/air mixture in a gas engine using "spark-plugs".
What is a circuirt?
Circuit is a path that transmits electric current. It has two types alternating current and direct current.
What is the SI unit for direct current?
The SI unit of EMF (electromotive force) in a direct current circuit is Volts. The circuits current is measured in ampere's
Which is a circuit used to change alternating current to direct current?
Insufficient information given.
What is the direction of an electric current in a circuit?
every electronic circuit works on the principle of direct current .hence from negative to positive.
What is the electric current from a battery?
A direct current is obtained from a connection to a battery.
What is an electric current flowing in only one direction?
In a series circuit, then yes, there is only one pathway. For example: if one bulb fuses, all the bulbs in the serial circuit will go out. But there are more pathways in a parallel circuit. For example: if one bulb fuses, all the other bulbs in the parallel circuit will still light.
