0
Yes, but typically for a short period of time depending on the capacitance and the load. For example in a motor application a starting capacitor will charge and then discharge to provide the extra boost to get a motor started.
Yes, but only for limited periods of time or for very low power loads. For example modern CMOS static RAM chips need only a few microamperes and often much less to hold data. This can frequently be supplied for quite some time by a simple supercapacitor. I once worked on an avionics unit that had to handle main powerbus dropouts of up to 15 minutes duration inflight, then resume operation when the powerbus came back up with no dataloss. This was handled in the unit's powersupply assembly by a secondary independent switching powersupply for backup RAM power during a main powerbus dropout. While the powerbus was up, it ran the main switching powersupply which supplied various voltages the unit needed including +5V to the RAM, also a large capacitor was kept fully charged to about 170V. When the powersupply assembly detected a main powerbus dropout and before the capacitors for the +5V to the RAM discharged, the secondary independent switching powersupply was turned on and it used the large capacitor as its energy source to supply +3.3V to the RAM to hold data. It could continue supplying this +3.3V backup RAM power until the large capacitor had discharged to roughly 10V, which took a little longer than 17 minutes.
What else can I help you with?
Why do you connect a capacitor with an Ac motor?
The capacitor is used to create a second phase from the single phase power source and it is the interaction between these two phases that causes the motor to turn.
Regarding Capacitors- can any general capacitor work on a circuit diagram that shows a polarized capacitor or do you need a special capacitor for polarization?
A Polarized capacitor means that the capacitor is polarity sensitive. if you were to connect the capacitor incorrectly the capacitor would blow up. A capacitor that is marked as being polarity sensitive will have the negative lead labeled usually with a white strip. These capacitors can only be used in conjunction with a dc source. Always consult a professional when installing electrical equipment.
Can a 7.5 mfd capacitor be used in place of a 5 mfd capacitor?
Sometimes. The exception is when the capacitor is used as a "timing" device. But 7.5 mfd and 5 mfd are so large that one would guess that they are not being used as timing devices.
What effect does the series resistance of a capacitor used in a capacitor filter have on diode current and ripple voltage compared with an ideal capacitor of no resistance?
The effective resistance of the capacitor reduces the ripple current through the capacitor making it less effective in its function of smoothing the voltage. But if the capacitor filter is fed by a transformer and diodes, the resistance of the transformer exceeds that of the capacitor.
What is discharging direction of capacitor?
When a capacitor discharges the discharge current flows in the opposite direction to the current used to charge it.
Why capacitor is used before UM66 in circuit for melody generator?
We used capacitor in UM66 because capacitors are used to store the energy, and hence when we press the switch it will charged the capacitor and energy stored in it, and after releasing the switch it releases the energy. So, we can use the capacitor to store the energy.
What type of capacitor should be charged slowly after not being used for a period to prevent damage if a sudden surge?
if exact replacement capacitors are not available,you should substitute it with a capacitor that has
What rule of thumb is used to indicate the amount of time it will take a capacitor to charge to the source voltage if there is a resistor in series with the capacitor?
A: Mathematically speaking the capacitor will never charge to the source because it takes one time constant to reach 63% and so on but for practical uses it is assume to be fully charged in 5 time constants R X C = 1 TIME CONSTANT
Why you use capacitors in power supply?
You use a capacitor to store electrostatic energy. You use an inductor to store electromagnetic energy. You use a resistor to dissipate electrical energy.
What is used to store potential electrical energy?
A Battery or a capacitor.
How does a capacitor get charged?
a capacitor is used to store charge for longer period of time.in odder to understand that how a capacitor gets charged consider two parallel metal plates.these plates are neutral having equal amount of positive and negative charges.now connect these plates to the opposite terminals of a battery.the electrons present in the plate connected to the positive terminal of a battery will be attracted by the positive terminal leaving the plate positively charged.now these electrons are pushed by the battery to its negative terminal which repels these electrons to the plate connected to it making it negatively charged. now the battery is disconnected.so in this way the plates of a capacitor gets charged.as these plates have opposite charges stored on them force of attraction exist between them enabling a capacitor to store charge for longer periods of time.
Can a capacitor be used in the Thevenin Theorem?
Sure, but it won't mean anything unless the Thevenin source is an AC source. In that case, simply determine the frequency of the source, and draw the appropriate reactance in the circuit where the capacitor belongs. If the Thevenin source is DC, then the frequency is zero, the reactance of the capacitor is infinite, and you can show it as an open circuit, i.e. not there.
What Is the measurement unit used to indicate the rate at which energy is stored and returned by a capacitor?
The measurement unit used to indicate the rate at which energy is stored and returned by a capacitor is capacitance, measured in farads (F).
What is the capacitance energy formula and how is it used in electrical engineering applications?
The capacitance energy formula is given by the equation E 0.5 C V2, where E represents the energy stored in a capacitor, C is the capacitance of the capacitor, and V is the voltage across the capacitor. This formula is used in electrical engineering applications to calculate the amount of energy stored in a capacitor and to design circuits that require specific energy storage capabilities. Capacitors are commonly used in electronic devices to store and release electrical energy, and understanding the capacitance energy formula is essential for designing efficient and reliable circuits.
What is the source of energy used by the chloroplast?
Light energy is used . Sun is the source
What the heck is a capacitor used for?
Very roughly speaking, it used for storing energy in its electric field.
What is the source of energy used by the mitochondria?
The source of energy used by mitochondria is ATP.
