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Can dc current pass through capacitor which is in series connection?
Wiki User
∙ 13y ago
No, unless its Voltage rating is exceeded (if it fails, a capacitor acts like a short). In a series connection, only alternating current (AC) can pass, because it will allow the capacitor to discharge sometime. DC will only charge it, as it will not flow the other way.
This behavior is useful, actually, when there is need to double the voltage in a circuit. Using transistors, a capacitor is charged, and then discharged into a bigger one (while simultaneously also charging the bigger one with the negative phase of AC, for example). Connect a few steps like this into a "ladder", connect the ladder to a transistor and a transformer, add a few diodes to prevent backflow, and you have yourself a flyback transformer - a device used to generate the high voltages needed to light up a TV picture tube.
Wiki User
∙ 13y ago
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Why current increases during discharging of a capacitor?
It really depends on the experimental setup. If you have only a capacitor and a resistance in series, the current discharge from the capacitor will start high, then gradually go down. If you have a capacitor and an inductor in series, the current discharge will start being small, because the inductor will oppose any CHANGE in the current - that's how they work.
How can you find the steady state current in RLC series circuit?
-- If the excitation source is AC, then the steady state of the circuit depends on the voltage, frequency, and waveform (harmonic content) of the source. -- If the excitation source is DC, then the steady state current in a series circuit is zero. DC doesn't pass through a capacitor.
How does electric current flow in the b connection?
how does electric current flow in the b connection? do the two bulbs in a series circuit, light when the middle bulb is loose? why?
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.
What happens in series lcr circuit?
in a series lcr ckt., wen d voltage across inductor Vl is > dan voltage across capacitor Vc, d voltage leads the current by an angle phi... n wen Vc > Vl d current leads the voltage by an angle phi... resonance occurs wen d reactance of inductor Xl = reactance offered by capacitor Xc... n hence at resonance, current through the circuit is max n reactence of ckt is minimum...
How does current flows when inductor n capacitor r in series?
The stronger the magnetic field on your inductor the greater amount of current you will have flowing through your series circuit.
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 series - parallel connection?
In series connection current will be same. in parrel connection voltage will be same and current wil be varying
Why current increases during discharging of a capacitor?
It really depends on the experimental setup. If you have only a capacitor and a resistance in series, the current discharge from the capacitor will start high, then gradually go down. If you have a capacitor and an inductor in series, the current discharge will start being small, because the inductor will oppose any CHANGE in the current - that's how they work.
How surge current is produced in a capacitor input filter?
Being that the capacitor appears as a short during the initial charging, the current through the diodes can momentarily be quite high. To reduce risk of damaging the diodes, a surge current limiting resistor is placed in series with the filter and load.
What is the current of a series-parallel circuit connection?
The current flowing through a series circuit is (voltage between the circuit's ends) / (sum of all resistances in the circuit). The current is the same at every point in the series circuit.
How would the hook up 3 resistors in a circuit to get a maximum current?
In series, R = R1 + R2 + R3 + ... The current in a series connection will only have 1 path. The current is the same through each resistor
What is the constant electrical quantity in a series connection and a series-parallel connection?
constant electrical quantity-series connection -current constant electrical quantity-parallel connection - voltage
What is the advantage and disadvantage of series connection?
advantages of series electrical current
Why there's high voltage at series rlc resonant frequency?
With a series RLC circuit the same current goes through all three components. The reactance of the capacitor and inductor are equal and opposite at the resonant frequency, so they cancel out and the supply voltage appears across the resistor. This means that the current is at its maximum, but that current, flowing through the inductor and the capacitor, produces a voltage across each that is equal to the current times the reactance. The voltage magnification is the 'Q factor', equal to the reactance divided by the resistance.
Which circuit draws the largest amount of current from the battery parallel or series?
Well firstly, is the capacitor connected to a DC or AC supply. On a DC supply the capacitor would draw current until it had fully charged, at which point the current falls to the leakage current. Electrolytic capacitor will always leak a little. On an AC connection, current will pass continuously, and the capacitor may rupture if connected across an AC supply. The current that would flow on an AC connection is given by the impedance, which is calculated from the reciprocal of 2 x Pi x F x C Because it is the reciprocal, the impedance reduces as the capacitance in Farads (F) increases. So, the bigger the capacitance, the higher the current. Therefore, for AC, only low values of capacitor are found connected across the supply (usually with a resistor in series) for interference snubbing across a contact or switch. Larger values are placed in series with the current, to act as current limiters or high pass filters.
A resistor R and a capacitor C are connected in series to a battery of terminal voltage V0 what equations relating the current you in the circuit and the charge Q on the capacitor de?
Current I=V0/R as per OHMs law: V=IR Charge on capacitor Q=CV=It
