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When a capacitor is being discharged in which direction does positive charge flow?
The 'conventional current' flows out of the positive side of the charged capacitor, and into the negative side. However, even though we never talk about it, we know that the things that actually carry the physical current around are the negatively charged electrons, and we know that when a capacitor is discharging, the electrons are flowing out of the negative side and into the positive side.
What two facctors determine the capacitive reactance of a capacitor?
The two factors that determine the capacitive reactance of a capacitor are the frequency of the AC voltage applied to the capacitor and the capacitance value of the capacitor. At higher frequencies and with larger capacitance values, the capacitive reactance decreases.
WHAT WOULD happen if you keep charging time shorter than time constant?
If you keep the charging time shorter than the time constant, the capacitor will not fully charge to its maximum voltage. The voltage across the capacitor will reach approximately 63% of the final value after one time constant. Therefore, if you stop charging before the capacitor fully charges, the voltage across the capacitor will be lower than expected.
Why can't metal be used as a dielectric in a capacitor?
Metal cannot be used as a dielectric in a capacitor because metals have low resistivity and would conduct electric currents instead of storing electrical energy. Dielectrics in capacitors need to have high resistivity to block the flow of electric current between the capacitor plates and store electrical energy in an electric field.
Is the electric field in a capacitor constant?
In an ideal capacitor, the electric field is constant between the plates. This means that the electric field is uniform and uniform inside the capacitor.
What is the use of capacitor in touch operated system?
Capacitors are used on touch screen technology. mystery of using capacitor in touch screen is the working principle of capacitor . when you touch the screen the distance between two plates inside screen will change(by pressing) and this will cause the change in capacitance and hence in voltage and this signal fed to processor to process it. and that behind the use of capacitor in touch screen.
What is the output resistance of common emitter amplifier with emitter resistor and without bypass capacitor?
Without a bypass capacitor it is just equal to Rc
Can i not use a capacitor on a motor equipted with the motor?
No. You won't be able to start the motor without the capacitor.
Does a arrowhead have to opposite sides parallel?
No. Parallel means the two lines will never ever touch. Take a square for example, if the top two lines carry on going, they will never touch without changing direction. An arrowhead's lines will never touch because they are both diagonal and they already touch without going any further. Hope this helps. (PS: I learned this in school and obviously it helps!)
What happen if you replace a 6.3 volt capacitor with a 10 volt capacitor?
Nothing will happen, you can go over 6.3v but never under......
What is the weight of the Honda 3.2 motor?
with or without flux capacitor
Can a capacitor store power continuously?
Yes, but not for ever. A capacitor can never be perfectly insulated and it has a small leakage current, that causes it to discharge eventually.
Output voltage of half wave rectifier without capacitor filter is less or more than rectifier with capacitor filter?
less
What is the most resistance that can be in series with the capacitor if the capacitor is to charge to at least 88 percent of its final voltage in no more than 8.0 s?
Without knowing the capacitance of the capacitor, your question cannot be answered.
How did Edison's first invention affect his future?
People couldn't see without light and we would never have the iPod touch and iPhone if he never made the phonograph ;)
Why should a capacitor never be held by its leads?
A capacitor is designed to store energy over time and then release it nearly instantaneously. If you are holding it by its leads it could discharge and kill you.
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.
