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How much charge can be placed on a capacitor with air between the plates before it breaks down if the area of each of the plates is 9.00 cm2?
Wiki User
∙ 12y ago
Three formulas are used to solve this problem V = Ed, C=(AKE0)/d and Q = CV.
V= Electrical potential (voltage)
E = Electric field (or Electric strength in this case) (3*106 for air
d = distance (plate separation
C = capacitance
A = Surface area (9*10-4 m2)
E0 = 8.85 * 10-12
K = Dielectric constant (roughly 1 for dry Air)
Substitute C and V from the first two formulas into Q = CV.
Q = (AKE0)/d * Ed
the distance cancles and you end up with Q = (AKE0)E.
Substitute in your numbers to find Q
Wiki User
∙ 12y ago
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If you take out the battery in a capacitor before inserting a dielectric will there still be charge on the dielectric?
The charge in a capacitor is between the plates. The dielectric is only an insulator that allows the plates to be very close without touching and discharging the charge. There is no battery in a capacitor.
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.
Capacitor not charge?
If a capacitor will not charge, it is open, i.e. damaged.
Do you need to charge your capacitor before you install it?
Yes you must charge it before hooking it up. You can charge it with a 12 volt light bulb with leads or a voltmeter.
Why does a capacitor keep its charge after the supply is disconnected?
Yes, it can. Then you can use the charge to power something else. :)
If you take out the battery in a capacitor before inserting a dielectric will there still be charge on the dielectric?
The charge in a capacitor is between the plates. The dielectric is only an insulator that allows the plates to be very close without touching and discharging the charge. There is no battery in a capacitor.
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.
An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up Now a slab of dielectric material is placed between the plates of the capacitor while the capacitor is still?
the charge on the capacitor had increased.
What is the difference between capacitor and capacitance?
A capacitor is a device that stores an electrical charge, or if you prefer- resists any change in voltage applied to it. Capacitance is a measure of the size or ability of a capacitor to do that. This is the Farad
Capacitor not charge?
If a capacitor will not charge, it is open, i.e. damaged.
Do you need to charge your capacitor before you install it?
Yes you must charge it before hooking it up. You can charge it with a 12 volt light bulb with leads or a voltmeter.
Why does a capacitor keep its charge after the supply is disconnected?
Yes, it can. Then you can use the charge to power something else. :)
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 does a capacitor store if the sum of charges of both capacitors is zero?
it may consist much of negative and positive chargeAnswerA capacitor stores energy within an electric field set up between its plates. It does not 'store' charage, as the net charge is the same both before and after the capacitor has been 'charged' (unfortunate use of the word!). What it does is to enable charge to be separated, with one plate then becoming negative with respect to the other, resulting in an electric field between the two plates.When we describe the 'amount of charge' on a capacitor, by convention, we mean the amount of negative charge stored on its negative plate, and not the sum of this and the amount of positive charge on its positive plate!
What is the net charge on the charged capacitor?
there is no net charge on the capacitor because nomber of positive and negative charge and negetive are equal.
What is a device used to store charge?
A capacitor stores an electric charge. An inductor stores a magnetic charge.
How a capacitor store charge?
by using capacitor plates. The length,area ,thickness and type of the plate determines the amount of charge a capacitor can store.
