how the value of capacitor is selected in electronic circuit, what value for what purpose, which location?
349042
It depends on the circuit you ar designing and again the part of the circuit. \n\nFor example if it is a power supply smoothing capacitor it would be a large value in micro farrads. \n\nBut if you want a capacitor for removing high frequency spikes, then it would need a small capacitor in pico or nano farrads.\n\nYou have to work with the formulae for the part of the circuit you are dealing with, and there are loads of formulas.
160314
Each of these  transistors have their own unique uses. They are chosen for use according to the best operating characteristics of a particular circuit, not by random preference.
772728
A resistor will resist current. A capacitor will push current in a certain derection, depending on how charge is built up on it. An inductor will resist change in current. No matter how much current is flowing through a circuit, the inductore will not resist that current until the current begins to change. This is the basis of RLC, alternating current.\n\nThe capacitor pushes current in one direction. The inductor resists this, but the capacitor wins. Then the capacitor eventually charges down and holds no potential difference, but has created a current in the circuit. The capacitor is no longer pushing the current forward, so the current would just stop if it were not for the inductor. The inductor keeps the current from changing too fast and causes the capacitor to build up another potential difference. This causes a current to move back and forth in an alternating fashion.
1177496
If you have a voltage regulator that is poorly designed (or adjusted?) it will overshoot the target voltage then correct and overshoot in the other direction, etc. etc.  Usually there must be some type of feedback in the circuit that accepts small deviations rather than "hunt" for a too precise voltage value.  Hope that helps a little.
1050520
Think about the simpliest capacitor. It is clear that two metal plates that don't touch won't let a DC current pass, right? But the spacing is very thin so that the plate's charges can effect one another. When you first put current (even DC) to a discharged capacitor, it charges up and for a brief time it does conduct current. How long? Well it will charge to 2/3 of the total voltage in RC seconds (where R is the resistance of the circuit). So when AC current is "fast" enough, the cap is constantly in a charge/discharge state and current flows. The effective resistance (reactance) of the cap is 1/(2*pi*F*C). So the resistance goes down as the capacitance and the frequency rises.\n\nThe inductor, on the other hand is just a coil of wire. Again, it is easy to imagine that it will conduct DC. But when you first apply current (even DC) to a coil, the magnetic field will interact with the coil and produce an opposing voltage. This only occurs when the magnetic field is forming or collapsing (remember, magnetic fields that do not move do not produce electricity). So right when you change the current, the inductor will "resist" the change, but if the current doesn't change, it is just a wire. The reactance of a coil is 2*pi*F*L, so the resistance increases with frequency and inductance.\n\nNow, combining inductors and capacitors is another interesting subject, but you didn't ask about that....
551210
Your question is not clear at all, but let me guess a little.\n\nAre you asking for the function of each component in the circuit ???\n\nIf so, light bulb will be the load.\nConductor is the mean for the current to flow.\nswitch, is for closing or opening the circuit\ninsulation, to keep conductors to short the circuit.\nmeter, to measure the voltage or current or power being used at some time.\nbattery is the power source to get the circuit to work.\n\nNow I guess I earn 10 points for best and only answer.
324170
the 20 ohm is shorted because the current can go through the switch without going through the reisistor. when it is closed, R =10+1 =11, V =3, Current = V/R = 3/11 amps\n\nbecause direct current cannot cross a capacitor, which is in cd. this is because a capacicotr is plates which are parallel and do not touch. obviously, if the plates do not touch, electricity cannot flow through them. alternating current can go through a capacitor, only because the capacitor keeps discharging
58713
Measure its capacitance.  Many multimeters have this capability.  If the body is not a two-terminal device (e.g., a capacitor), measure the capacitance from the body to a ground plane.  Then measure its voltage with a very high-impedance voltmeter.  The act of measuring will drain off some charge, so you have to take a reading quickly.  The charge in Coulombs is V*C, where V is voltage in volts, C is capacitance in Farads.
79059
The way that I have always determined whether or not an element or even device is passive or active is whether or not that device requires a source of electricity to perform its function.  For example, a resistor, capacitor, inductor, or even diode merely takes a signal and affects it in some manner consistant with its function.  A transistor, on the other hand, requires a third input to perform its function.  This would be true for IC's like op amps as well.  This distinction can also be extended to devices such as cavity combiners would be a passive element while an amplifier would be considered active.
792406
let the initial charge on the capasitor be q. Then for charging the equation is given by:\nQ=q(e)^(-t/T);  where e is base of natural log. 't' is the time and 'T' is time constant which is probably 1/(RC)\n\nfor discharging\nQ=q(1-(e)^(-t/T));\n\nnow the graph can be easily plotted by taking Q on 'y' axis and 'q' on x-axis.
299635
it does with the current what a capacitor does with the voltage. it stores current in open circuit, leting it then go with a continous growth. can be used as a source of magnetic field
1184980
Differential equations is very useful to electronics inductries. This is commonly used in designing electrical circuit and their responses to the signals. Input current response, voltage responses and even time decay is critical to the computation of integrated circuit responses. Without is certain electrical functions such as response time, triggering mode, active and inactive function regions will not be possible.
441296
In certain low volume and high speed circuits, transistors will always have their places. ALthough their are now many more radio chips.\nMIKE
1095597
Reactance, like resistance, tells you how a capacitor responds (reacts) to a current or voltage. From the reactance, you can find the V/I relationship. It is defined as X=1/wC where w is the radian frequency and C is the capacitance of the circuit.\n\nIt will be better if you can let us know your education level and we can describe according to your need.\n\nhttp://www.kodkodkod.com/database.htm\nhttp://www.kodkodkod.com/index_files/submitquestion.htm\n\nRegards,\n\nKodKodKod Learning Consulting
34488
In electronics, it is a less-commonly used word for capacitor; more often found in non-electronic context, such as the automotive ignition system.\n\nA capacitor is a device that stores energy in the electric field created between a pair of conductors on which equal but opposite electric charges have been placed.\n\nThe ignition system of an internal-combustion engine is an important part of the overall engine system.
365027
The capacity of a capacitor is measured in farads (F). Ususally they range from several picofarads (pF) to several microfarads (µF). For the measurement, look on the capacitor itself or if it is a disk capacitor then there is a system for figuring that out (look it up).
969269
Whether or not a motor needs a capacitor depends on the type of motor. There are at least 5 or 6 different types of single phase motor, some requiring capacitors, some not (pf correction aside).\n\nIt is likely that the device wired to the motor in the dishwasher is required where ever you use it. It is also usual for start capacitors to be mounted on the side of the motor but may not always be the case. A capacitor is normally cylindrical and will have a value in micro farad.\n\nTake a look at the link below and see if any of the options on it resemble what you have.\nhttp://www.tcf.com/TCFBlower/pdfs/engr_data/ED1100.pdf\n\nThey don't mention another type that is often used in domestic appliances but is clear to identify by the fact it has brushes and commutator, this type would not normally need any separate control\n\nI have even found a dc motor in a standard washing machine, obviously a dc motor requires some other circuitry to use on the mains. I don't know how common this would be to find since I don't take apart too many domestic appliances.