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Why dc can be stored ac cannot stored?
Why direct current (DC) can be stored but alternating current(AC) can not be? Current means flow of charge per unit second. Any flow cannot be made stationary. Then it is not flow. Hence both direct current and alternating current cannot be stored. We can store only charges. In capacitors we store charges and not current. For storing we use direct supply or direct voltage When a capacitor is connected to a battery, which is a source of direct voltage, each plate of the condenser get charged. Charges remain in the plates. No current flows in between the plates. When the source is removed, there are some charges left in the plates. We say that charges are stored in the plates. If an alternating source of supply is connected in between the plates,every instant ,the charges in the plates are alternating and they are not stationary. When ac supply is removed, all the charges move out of the plates and hence no charge is left in them. Hence charges can be stored with dc supply and not with ac supply. However as long as the ac is connected to the capacitor, the capacitor gets stored and emptied with the frequency of the ac supply.
Why does each plate receive charge of exactly same magnitude?
the plates of capacitor are connected to the same battery so same potential difference will develop across the plates of capacitors, as a result charges of same magnitude will be stored, as the charges are being supplied by the same battery.
Charge buildup between the plates of a capacitor stops when?
Charge buildup between the plates of a capacitor stops when the current flow through the capacitor goes to zero.
A 5 uf capacitor has 5x10 -4 coulombs a charge stored in its plates find the voltage across the capacitor?
A5uf capacitor has 5*10-4 coulombs of charge stored on its plates
An air capacitor is a?
And air capacitor is usually a motion capacitor whereby plates mesh to form a different capacitance using air as dielectric
Why dc can be stored ac cannot stored?
Why direct current (DC) can be stored but alternating current(AC) can not be? Current means flow of charge per unit second. Any flow cannot be made stationary. Then it is not flow. Hence both direct current and alternating current cannot be stored. We can store only charges. In capacitors we store charges and not current. For storing we use direct supply or direct voltage When a capacitor is connected to a battery, which is a source of direct voltage, each plate of the condenser get charged. Charges remain in the plates. No current flows in between the plates. When the source is removed, there are some charges left in the plates. We say that charges are stored in the plates. If an alternating source of supply is connected in between the plates,every instant ,the charges in the plates are alternating and they are not stationary. When ac supply is removed, all the charges move out of the plates and hence no charge is left in them. Hence charges can be stored with dc supply and not with ac supply. However as long as the ac is connected to the capacitor, the capacitor gets stored and emptied with the frequency of the ac supply.
Why does each plate receive charge of exactly same magnitude?
the plates of capacitor are connected to the same battery so same potential difference will develop across the plates of capacitors, as a result charges of same magnitude will be stored, as the charges are being supplied by the same battery.
Charge buildup between the plates of a capacitor stops when?
Charge buildup between the plates of a capacitor stops when the current flow through the capacitor goes to zero.
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.)
How capacitor opposes the change in current?
as a voltage is applied across a capacitor charges accumulate on the plates.due to accumulation of charges,electric field between the plates develop in the direction opposite to the applied field.this field give rise to the potential across the plates.if the plates get completely charged due to the applied voltage i.e if the whole of the charge q=c(capacitance of the capacitors)xv(voltage applied) develops on the plates,then the applied voltage wiil be opposed to an extent that no further charges will induce on it.But in practice,it takes very long time for the capacitor to get completely charged due to the applied voltage..............now coming to ac circuits,having capacitor.......if the frequency of ac applied voltage is less then the voltage will change slowly.due to this at each instant large amount of charge will develop on the plates causing large opposition.vice versa to high frequency applied voltage.
A 5 uf capacitor has 5x10 -4 coulombs a charge stored in its plates find the voltage across the capacitor?
A5uf capacitor has 5*10-4 coulombs of charge stored on its plates
Explain how the dielectric material or medium of electrical charges affect the value of potential energy?
the dielectric placed between the positive and negative plates of a capacitor prevents the collapse of plates due to so strong attractive forces between them and retains the potential difference between the plates.....
What are the methods to find capacitance of a capacitor?
You could measure it with a Capacitance meter. Or you could use the formula:In a parallel plate capacitor, capacitance is directly proportional to the surface area of the conductor plates and inversely proportional to the separation distance between the plates. If the charges on the plates are +q and −q, and V gives the voltage between the plates, then the capacitance C is given byFor further info on the total value of capacitance in series or parallel, Google it.
Does a magnetic fIEld have an effect on a capacitor placed in between the plates?
Does a magnetic field have an effect on a capacitor when it is placed between the plates? Yes, a magnetic field between the plates of a capacitor would have some effect. Without more information it is difficult to determine how much.
What is the definition of a Teflon capacitor?
A teflon capacitor uses teflon as the dielectric, or insulator, between plates.
What is the meaning of a capacitor been shorten?
A shorted capacitor is one where the gap between the plates is damaged, and the plates are touching each other, creating a short circuit.
What is the principle of capacitor?
The simplest capacitor is just two parallel metal plates, not touching. When a battery is connected across the plates, the plates become charged, with electric charges sitting facing each other, positive ones on the positive plate and negative on the negative. When the battery is removed, the charges stay where they are so the capacitor is a way to store electric charge and energy, a bit like a rechargeable battery. Supposing the battery was 1 v and the charge is +1 coulomb on one plate and -1 coulomb on the other. That means the capacitor has a capacitance of 1 Farad. The amount of charge a capacitor can store is given by the formula Q = CxV in other words the charge is the capacitance times the voltage. So a large capacitance can store more charge for the same voltage. With the 2-plate capacitor the capacitance increases if the plates are bigger and also if they are closer together. Larger capacitance can be produced by using two sets of interleaved plates. Each set has all its plates connected together, and there is dielectric insulation between all the plates.
