0
capacitor blocks DC, after it finishes charging.
Actually, it resists any CHANGE to DC (ie ac), after it has finished charging. IRT the actual question, current will always flow, as long as there is a closed circuit.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoIt has been observed that, if the dc voltage across the capacitor is constant, the initial current through the capacitor starts high but soon falls to zero.
This means that the capacitor, with no initial charge, on application of a dc voltage first acts as a closed circuitbut, as soon as it is fully charged, the capacitor behaves as an open circuit.
Moreover, a capacitor can both store potential energy - in the form of charge, which is measured in coulombs - and give up that potential energy in the form of a flow of charge, called an electric current measured in amperes, which is the name for a flow of coulombs per second.
If the voltage source is removed from it after it has been fully charged and a resistor is placed across its two terminals, the current initially starts high but soon falls to zero.
If the current flowing from it is zero a capacitor can store a finite amount of charge for an indefinite time after it has been charged up from a dc voltage source. The actual time it can store the charge depends on the quality of its internal insulation, its 'dielectric' material.
The amount of charge it can store dependson the capacitor's size - its capacitance, measured in 'farads'.
Wiki User
∙ 11y agoA Capacitor won't "conduct" DC current since it normally stores Energy during the positive phase of AC, and releases it during the negative phase
Add your answer:
Earn +20 pts
What is dc link capacitor?
when the DC current flows through the capacitor .the leakage of the charges is in capacitor called Dc leakage capacitor .
When DC power is first applied to an uncharged capacitor it appears as a?
When DC power is first applied to an uncharged capacitor it appears as a short circuit.
Why the capacitor stores energy in the form of DC though it does not allow DC?
DC does not flow through a capacitor because there is no electrical connection between the plates; they are separated by an insulator calibrated for capacitance.
Why capacitor blast?
due suppling dc current
But in DC ciruit there is no current when capacitor is connected?
This is because when you introduce a capacitor, the circuit is no longer a DC circuit. If you're using a multimeter see if there is an AC setting to measure the current.
Why a capacitor does not accept AC?
A capacitor conducts AC but do not conduct DC because it is meant to store charge.
Why capacitor does not store alternate current but store direct current?
Because Alternet current has both positive as well as negative cycle capacitor does not conduct for negative cycle of the Alternet current and DC all are positive cycle thats why it capacitor conduct for DC not for AC
What is dc link capacitor?
when the DC current flows through the capacitor .the leakage of the charges is in capacitor called Dc leakage capacitor .
What is the function of Thyristor module in inverters?
Usually these devices will conduct during an AC phase cycles to charge a capacitor to produce DC.
What happens when a capacitor connected across a battery for a long time?
For a long time, The capacitor will be charged to the voltage of the DC battery, the positive side of the capacitor touching the positive terminal of the battery. Not much DC current will conduct, except for some tiny leakage current due to imperfection of the cap. The battery will be drained eventually.
How do you determine whether the capacitor is in workinfg condition?
Remember that a working capacitor can't conduct current through it. A capacitorthat's NOT in working condition has typically failed because the dielectric has beenpunctured, resulting in a conductive path between the 'plates'. Any DC conductivitythrough the capacitor indicates that the component has failed. DC conductivity iseasy to spot with an ohmmeter.
What capacitor blocks either ac or DC?
Always DC.
Can capacitor work in dc?
Yes.
When DC power is first applied to an uncharged capacitor it appears as a?
When DC power is first applied to an uncharged capacitor it appears as a short circuit.
Will a capacitor lower voltage?
A: As soon as a DC voltage is applied the capacitor is a short or no voltage
Why the capacitor stores energy in the form of DC though it does not allow DC?
DC does not flow through a capacitor because there is no electrical connection between the plates; they are separated by an insulator calibrated for capacitance.
The electric device which blocks DC?
It is capacitor
