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What capacitor or circuit will keep a 12V device running at 3 amps for 30 seconds after it is turned off?
Wiki User
∙ 16y ago
The easiest way is to connect a 12v battery to the circuit. Be sure to place a diode in the positive line (watch polarity) to keep the battery from loading down the power supply when charging.
Wiki User
∙ 16y ago
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What means by the name capacitance of a capacitor?
The capacitor is an electronic device. Capacitance is the energy stored within this device.
What is the name of the device used for measuring the inductance of a capacitor?
A capacitor nominally has no inductance, which is lucky because there is no such device to mesure it with.
How do you measure the capacitance of 3 phase capacitor in active line voltage of 3 phase circuit?
You measure the capacitance of a capacitor in an active circuit by observing the voltage across it and the current through it. That gives you, by Ohm's law, the impedance of the capacitor. Plug that in the the equation for capacitive reactance, and you get capacitance. Note: There is no such thing as a three phase capacitor. A capacitor is a two terminal device that resists a change in voltage inversely proportional to its capacitance. You connect one capacitor to one phase. If you have a "three phase capacitor", then you are talking about three capacitors. Deal with each one separately.
How do you use capacitor in a sentence?
Capacitor is a noun, as in a person, place or thing. It is an electrical device. Ex: The capacitor failed and has to be replaced.
The electric device which blocks DC?
It is capacitor
Define capacitance with respect to physical structure and electrical function?
capacitance, in electricity, capability of a body, system, circuit, or device for storing electric charge. Capacitance is expressed as the ratio of stored charge in coulombs to the impressed potential difference in volts. The resulting unit of capacitance is the farad [for Michael Faraday]. In an electric circuit the device designed to store charge is called a capacitor. An ideal capacitor, i.e., one having no resistance or inductance, may be spoken of as a capacitance. When an alternating current flows through a capacitor, the capacitor produces a reactance that resists the current (see impedance). While every element of a circuit has some capacitance, it is a goal of good design to reduce such unwanted or stray capacitance to a minimum.
Which electronic component can store a charge?
A parallel plate capacitor is an electrical component which can store charge. The charge is stored according to the equation: qo = q(1-e-t/RC) [in a charginr circuit.]
What is the term used to describe the ability of a device to store energy in the form of an electrical charge?
Simply put, an electronic device that stores charge is a capacitor.
How is make capacitor?
Capacitor is nothing but a storage device. It has a dielectric media in between the two electrodes. the nature of the capacitor is charging and discharging the voltage.
What is the use of resistors in a circuit?
One use is as a current limiter. For example if a certain device (like a capacitor) is capable of being in conditions similar to a short circuit, the amount of current "drawn" by the capacitor could be damaging to it or other components. Placing a resistor in series with the capacitor means that you can select the proper resistor so that at maximum capable volt, you know the maximum current that will flow through that value resistor according to Ohms Law. Another use is to design to have a desired voltage present in certain parts of the circuit.
Can a capacitor serves as energy saver device?
no, not really
How DC behave with Capacitor?
Capacitor contains a dielectric sandwitched between two plates. So, it act as a charge storage device. When dc supply is given,it gets charged to its maximum capacity or potential equal to the supply, and then it act as a open circuit, since it has no way to discharge.
