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Why does capacitor block dc?
A physical capacitor is made of two conducting plates arranged face-to-face, with vacuum or an insulating material between them. So the capacitor is actually an 'open' circuit ... there's no continuous conducting path through it, and if you connect it to the terminals of a battery, no current flows through it. It performs its job completely by means of the electrostatic forces of attraction or repulsion between charges on the two plates, but there's never actually any flow of electrons across the space between the plates. (If there is, then the 'dielectric' is punctured, and you need a new capacitor.)
What is the difference between capacitor and conductor?
A conductor is a material that possesses free charge carriers capable of transferring an electrical charge. A capacitor is a discrete device in which two conducting plates sandwich an electrolytic wafer. The purpose of a capacitor is to store a charge for a finite amount of time.
What are the two parts for a variable capacitors?
The main parts of a capacitor are:two conducting plates separated byan insulating material (called a dielectric) surrounded byfurther insulation - plastic or paper - as a protective jacket andexternal wires (connected internally to the plates) to allow the capacitor to be connected into a circuitand, on large units:a protective case made of metal or plastic andexternal terminals connected internally to the plates,to allow the capacitor to be connected into a circuit.
What is the use capacitor?
capacitor is charge holding device ,it holds charge on two plates named as +ve and -ve
Which consists of two plates separated by a dielectric and can store a charge?
Capacitor
On what factors capacitance of a capacitor depends on?
The job of a capacitor is to store charge onto its plates. The amount of electrical charge that a capacitor can store on its plates is known as its Capacitance value and depends upon three main factors.The surface area, A of the two conductive plates which make up the capacitor, the larger the area the greater the capacitance.The distance, d between the two plates, the smaller the distance the greater the capacitance.The type of material which separates the two plates called the "dielectric", the higher the permittivity of the dielectric the greater the capacitance.
What two facctors determine the capacitive reactance of a capacitor?
The reactance of a capacitor is a function of -- the capacitance of the capacitor -- the frequency of the voltage across the capacitor
Capacitor is essentially a formed coil of insulated copper wire?
No, that's a "choke", or if there are two coils, it's a transformer. A capacitor is two "plates" (in reality they are usually just foil) that are connected to two wires. Often (typically) there is an electrolytic between the plates. There is more to a capacitor, but that's the basics.
When a capacitor is neutralized where does excess charge go back to?
A capacitor is "charged" when the charge on the two plates is not the same. When you neutralize or "discharge" the capacitor you are transferring charge back to the low plate, so that the charge on both plates is the same.
What Capacitor means transferring electrons from one plate of capacitor to the other?
That would be done by a resistor connected between the two plates.
What is cylindrical capacitor?
A cylindrical capacitor is a type capacitor in which two conducting cylinders are used and the dielectric medium is placed in between them .The outer most cylinder is earthed .The capacitance of these capacitors are higher than other
How are capacitors made?
A capacitor, in its simplest form, is two conductive plates separated by a dielectric.
