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What to expect if a resistor is placed in a dc circuit with a capacitor?
Wiki User
∙ 13y ago
when we replace the resistor with a capacitor ,the current will flow until the capacitor charge when capacitor will fully charged there is no current through the circuit because now capacitor will act like an open circuit.
for more info plz E-mailt me at "zaib.zafar@Yahoo.com"
Wiki User
∙ 13y ago
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What is swamping resistance?
(Electronics) Resistor placed in the emitter lead of a transistor circuit to minimize the effects of temperature on the emitter-base junction resistance and its resistance is called swamping resistance.
Does a magnetic fIEld have an effect on a capacitor placed in between the plates?
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What is starting capacitor and run capacitor?
A starting cap is placed in circuit of the start windings only when the motor is starting and is normally of a higher capacitance than a running cap, in the region of 70 - 120 mf, where a running cap stay connected with the start windings of the motor and is normally an 8 mf cap.
Is a resistor an input?
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What kind of device is a resistor?
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What is the function of the capacitor in the fluorescent lamp?
A capacitor is placed across the supply of a fluorescent lamp circuit to correct the power factor
What is the voltage obtained when a capacitor is placed in a dc circuit?
Eventually, the capacitor will charge to approximately the source voltage level. As this occurs, the current in the circuit will drop to near zero.
What is swamp resistor?
Resistor placed in the emitter lead of a transistor circuit to minimize the effects of temperature on the emitter-base junction resistance.
What is the function of capacitor across the supply to the fluorescent lamp when it is used?
A capacitor is placed across the supply of a fluorescent lamp circuit to correct the power factor
How do you discharge 25 Kvar capacitor in 690Volt system?
This capacitor carries a current of 25,000/690 or 36.2 amps and its impedance (reactance) is 19 ohms. The capacitance is 1/(2.pi.50.19) or 0.000167 Farad, on a 50 Hz system. The time-constant is CR so that if a 20,000 ohm resistor is placed across the capacitor the time-constant is 3.3 seconds. The voltage is reduced by 99% after 5 time-constants or in this case 17 seconds. If the discharge resistor is permanently in circuit it dissipates 690^2 / 20000 or 24 watts.
How a trimmer capacitor use?
A trimmer capacitor is a semi-adjustable capacitor placed across a variable tuning capacitor and pre-set to allow the main capacitor to track correctly with another variable capacitor on the same shaft. The adjustment takes out any differences introduced by the connected circuit.
Can inserting a resistor in a circuit have an effect similar to an short circuit?
It creates an extra load to the circuit if placed parallel to other circuits. this load approaches the equivalent of a short circuit as the resistance value placed there reduces.
When capacitors are used to shunt current across components such as resistors they are called?
A capacitor is typically placed across a resistor for the purpose of shunting either the AC component of a current (as in a transistor amplifier) or transient AC 'spikes', and is referred to as a "bypass capacitor".
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 will the affect of capacitance of a capacitor when a conductor is placed between a capacitor?
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What will Op-amp do?
Operational amplifiers are used in many applications where a well defined transfer function is needed. In former times they were widely used in analogue computers and simulators. The ideal op-amp is a phase-inverting voltage amplifier with infinite input impedance, zero output impedance and a very high voltage gain. Practical op-amps like the 741 achieve this very well. The simplest op-amp circuit is a voltage amplifier with a resistor between the input and output terminals, and a resistor in series with the signal input. The defined voltage gain is the ratio of the two added resistors, feedback resistor divided by the input resistor. The effect of the feedback resistor and the high voltage gain is to make the input terminal of the op-amp have a very low signal voltage (i.e. the output voltage divided by the intrinsic gain) and that point is called a 'virtual earth'. This allows the circuit to be considered as one in which the current flowing through the input resistor is transferred to the feedback resistor. Another simple example is to replace the feedback resistor by a capacitor. The current in the input resistor is transferred to the feedback capacitor so that the output voltage is proportional to the charge in the capacitor. Because charge is the time-integral of current, this circuit is called an 'integrator'. A loop made by two integrators and a phase inverter forms an oscillator. More interestingly it simulates a resonant system in which the damping factor can be controlled by a resistor placed across one of the capacitors. This allows the circuit to simulate the effects of a simple control system, and in this way analogue computers were widely used in the study of stability in control systems.
Why is a circuit a circuit?
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