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DC does not travel through a capacitor for long because there is a buildup of charge on the plates and when the voltage matches the supply voltage, mo more current flows.
But capacitors are used to smooth a DC supply because a capacitor acts a bit like a small battery and can prevent any rapid fluctuations in the supply voltage.
What else can I help you with?
Can you explain why oil filled capacitors must be used for capacitor run motors instead of the more economical ac electrolytic types?
Electrolytic capacitors cannot be used on an AC (alternating current) system.
Whether film capacitors can be replaced with ceramic or mica capacitor?
Film capacitors cannot be replaced with ceramic or mica capacitors if used for analog signal processing. However, mica capacitors can be replaced with ceramic capacitors in general.
Does a capacitor block ac current dc current or both?
No you can't use DC capacitors in Ac because in DC current , the current flows directly while in AC current, the current flows curved zig-zag. Thus Dc equipment can't mingle with AC as they need Direct flow. So DC capacitors can't be used for AC current...................AnswerMost capacitors will operate on either DC or AC. The exception is the polarised-type capacitor, which is designed to operate with a DC or an appropriately-biased supply.Often, a capacitor's rated voltages is specified in terms of DC -for example, '100 V (DC)', so care must be exercised if it is to be used with AC. This is because we always measure AC voltages as root-mean-square (rms) values, not as peak values. For example, '100 V (AC)' actually peaks at 141 V*. So, applying 100 V (AC) to a capacitor rated at 100 V (DC) may cause its dielectric to fail. In this example, the maximum allowable AC voltage must be 70.7 V, which peaks at 100 V.(*To explain: Vrms = 0.707 Vmax )
If capacitors dont use ac current then how and why are they used in most appliances?
Capacitors resist a change in voltage, proportional to capacitance and current. This is called capacitive reactance. As a result, a capacitor in an AC circuit will create a leading phase angle, current relative to voltage. This, for example, can be used to help start a motor by creating two magnetic fields, one leading the other.
What is use of rectifier?
Rectifier is used to convert alternating current to direct current.
Can you explain why oil filled capacitors must be used for capacitor run motors instead of the more economical ac electrolytic types?
Electrolytic capacitors cannot be used on an AC (alternating current) system.
What are uses capacitors?
.Capacitors are widely used in electronic circuits for blocking direct current while allowing alternating current to pass. In analog filter networks, they smooth the output of power supplies..Capacitors are used in virtually every area of electronics, and they perform a variety of different tasks. Some capacitors are used for coupling, others for decoupling, while others may be used in filters, and some may be used for power supply smoothing. Again some capacitors will be used in low frequency circuits, and others in high frequency circuits.
Direct electric current cannot be used to operate A. Electric motors B. Electric heaters C. Electromagnets D. Transformers?
Direct electric current cannot be used to operate D. Transformers.
Whether film capacitors can be replaced with ceramic or mica capacitor?
Film capacitors cannot be replaced with ceramic or mica capacitors if used for analog signal processing. However, mica capacitors can be replaced with ceramic capacitors in general.
How do you make direct current from alternating current?
First, the alternating current is filtered through a rectifier diode, that is, a device that lets the current pass only in one direction. This will produce a current that goes only in one direction, but that pulsates. To smooth this out, i.e., to convert it into a relatively uniform current, capacitors are used as "buffers".
Is your house alternating or direct current?
Alternating current. Direct current is used in batteries.
What can change alternating current to direct current?
A rectifier is used to convert alternating current (AC) to direct current (DC). The rectifier allows current flow in one direction only, converting the back-and-forth flow of AC to a constant flow in DC circuits.
What letters are used to direct current?
DC are the letters for direct current AC are the letters for alternating current
What letters are used to indicate direct current?
DC are the letters for direct current AC are the letters for alternating current
What is use of capacitor in electronics circuit?
to limit the current and to use it as a back up battery capacitors are used ..
Where do you use direct currect?
An example of direct current is the current used from a car battery to activate the starter motor. Also the flashlight uses direct current.
What current types are diodes used in?
Direct Current or DC
