Charge & Energy Stored in Charged Capacitor (14V, 113pF)

In summary, a charged capacitor is an electronic component that stores electrical energy in the form of an electric charge. When a voltage is applied to it, electrons flow onto one of the plates, creating an imbalance of charge. The amount of charge stored is directly proportional to the voltage, and the energy stored is a function of both the voltage and the amount of charge. This energy can be used in various electronic circuits and to filter out unwanted frequencies in electronic signals.
  • #1
baker265
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Homework Statement


A voltage of 14 V is placed on a capacitor with C = 113 pF (picofarads).

(a) What is the charge on the capacitor?

(b) How much energy is stored in the capacitor?

I believe I have the correct equation but I'm not sure about the final answer because of the picofarads. Are my answers correct?

Homework Equations



(a)Q=C*U
(b)E,stored=1/2*C*U^2

The Attempt at a Solution


(a)113*14=1.582e-6
(b)113*14^2*(1/2)=11.074e-6
 
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  • #2
Your units are off by a few orders of magnitude.

1 picofarad = 1 × 10-12 Farads
 
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FAQ: Charge & Energy Stored in Charged Capacitor (14V, 113pF)

What is a charged capacitor?

A charged capacitor is an electronic component that stores electrical energy in the form of an electric charge. It is composed of two conductive plates separated by an insulating material, known as a dielectric.

How is charge stored in a charged capacitor?

When a voltage is applied to a capacitor, electrons from the negative terminal of the power source flow onto one of the plates, while electrons from the other plate flow onto the positive terminal. This creates an imbalance of charge, which is stored in the capacitor.

What is the relationship between voltage and charge in a charged capacitor?

The amount of charge stored in a capacitor is directly proportional to the voltage applied to it. This means that the higher the voltage, the more charge can be stored in the capacitor.

How is energy stored in a charged capacitor?

The energy stored in a capacitor is a function of both the voltage and the amount of charge stored. The formula for energy stored in a capacitor is E = 1/2 * C * V^2, where C is the capacitance (in Farads) and V is the voltage (in Volts).

How can the energy stored in a charged capacitor be used?

The energy stored in a capacitor can be used in a variety of electronic circuits, such as in flash cameras, lasers, and power supplies. It can also be used to filter out unwanted frequencies in electronic signals.

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