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is it ? are you sure ? but i know so many circuit where capacitor is connected with ac supply .
still , if u connected a capacitor to dc supply , then :
1. if it is in SERIES with the dc supply , it will block all the dc current as capacitor
provides infinite resistance to dc current .
application : where u want to block dc current.(simple high pass filter)
2. if it is in PARALLEL with the dc supply , it will not block dc current , but if any ac
current comes out from the supply , the ac current will go through the
capacitor , as capacitor provides small resistance to ac current.
application : a) where u want to block ac current.(simple low pass filter)
b) to filter the noise (ac components) of dc supply.
Dc current cannot pass through a Capacitor as it get charged only if alternating pulses(sine wave) are applied as the input.As a result,the capacitor cannot get charged.
<<>> The capacitor charges up to the level of the supply voltage. A capacitor is normally connected across the supply in a piece of equipment fed from a dc source. It is called a decoupling capacitor and it isolates the equipment from outside effects coming in on the supply wires.
In a DC (direct current) circuit, an inductor (sometimes called a "coil") acts as a straight piece of wire, while a capacitor is a break in the wire. These components are only useful in alternating current circuits.
in general ,capacitors act as a open circuit for dc voltage supply...
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What is a DC shunt motor?
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
What is the purpose of a blocking capacitor?
At high frequency, capacitor can be considered as 1. Short Circuit in AC analysis. 2. Open Circuit in DC analysis. {because Xc= 1/(2*f*pi) where f= supply frequency,pi=3.14} As at high frequencies, in DC analysis, capacitor will be open circuited & can block the DC signal while AC signal is allowed to pass through.. Hence, this capacitor will act as a blocking capacitor for DC supply.
Why there is no reactive power in DC system?
In case of dc there is no reactive components and current drawn from the supply is in phase with the voltage.due to absence of inductor and capacitor the reactive power demand in dc is zero.
What is capacitor smoothing?
A Smoothing Capacitor is a capacitor which helps to smooth out fluctuations that may exist on a power supply line.
Why capacitor allows ac and not dc?
CAPACITOR BLOCKS DC SUPPLY .THERE ARE MAINLY TWO ANSWERS 1.CAPACITIVE REACTANCE Xc=1/( 2*3.1416*F*C) , HERE THE FREQUENCY OF DC SUPPLY IS ZERO .HENCE THE REACTANCE VALUE IS INFINITY .SO IT BLOCKS THE DC SUPPLY. 2.CURRENT THROUGH A CAPACITOR IS PROPORTIONAL TO THE RATE OF CHANGE OF CURRENT . BUT IN THE CASE OF DC SUPPLY, THE RATE OF CHANGE OF CURRENT IS ZERO. HENCE THE CAPACITOR CURRENT IS ALSO ZERO. H.L.kiran
What happens if a DC motor is connected to an AC supply?
Through loda
What happens if dc supply is connected to incomer of transformer?
If a DC supply is connected to the incomer of a transformer, you effectively have a short circuit, because the DC impedance of a transformer (actually, any inductor) is quite low. You will blow something.
If vm is maximum peak voltage of rectifier outputthis rectifier output is connected to the capacitor filterwhat will be the approximate dc output voltage to the capacitor filter?
It should be the rms value of your supply.
What type of function of capacitor in dc power supply?
It filters ac to pure dc
What will happen if inductor connected with DC supply?
i think in case of dc supply there will not be any induction
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.
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.
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.
Can a DC series motor with speed control be connected on AC supply?
A dc series motor with speed control can be connected on ac supply because dc machines are totally reversible.
Why you using DC power supply for capacitor?
Because it does not allow ac to pass through it...
What is a DC shunt motor?
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
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 .
