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Circuits
Overachieving and under-appreciated, circuits are the foundation that our technological society is built on. Now's your chance to find out not only how they work, but why. Questions regarding the physics behind voltage, resistance, capacitance, inductance, transistors, LEDs, switches, and power supplies; and how they're used to create analog and digital circuits, should be directed here.
1,646 Questions
If you're talking about the 're-imagining' of the classic John Badham flick Short Circuit, there's no release date set yet except for the vague time frame of 2011.
Why Common Emitter Configuration is most commonly used in amplifier circuits?
the common emitter configuration is most widely used in amplifer circuits because of its high voltage,current & power gain.
the common emitter configuration is most widely used in amplifer circuits because of its high voltage,current & power gain.Can a 110 volt appiance work on a 220 volt circuit?
It depends. If they are multiple voltage 110-220v appliances (such as most computer power supplies are) they obviously can be, taking special care to check if a switch has to be flipped to use the other voltage. If they are 220v-only devices, you need some sort of a converter to use them. That can be for instance a 110v/220v transformer, but if WILL be bulky and heavy as hell, and available for relatively small power only. Or you might use an electronic 110v/220v power converter, if you can find one, which might be considerably lighter and possibly available for higher power, but it probably won't be that cheap either. If the appliance is a fairly generic one, buying a new 110v model is probably the easiest and cheapest way to do it. It should be noted that a lightbulb- or heating-element-type appliance should still work with the smaller voltage, just weaker, as opposed to the reverse situation of supplying 220v to a 110v device, which would certainly burn out. It is however rather pointless to try to do it, and HIGHLY NOT RECOMMENDED.
Can electricity can be pass through milk?
yes, there are enough dissolved salts in milk to conduct some current.
What are the applications of bandstop filters?
for...example..you..have..frequency...range...of..f1-f2-f3-f4,
now..your..work..requires..you..to..avoid..frequency..band..of..f2-f3....
what..you..will..do???you..have..to..avoid..or...reject..that..particular..band...so..you..will..
have..to..design..a..filter..circuit..according..to.the..requirement..
What happens to the resistance as the conductor is measured?
The longer the conductor the greater the end to end resistance.
Give atleast 6 to 7 differences between conventional current and electric current?
can't as there is only one: they are in opposite directions.
conventional current flow was defined arbitrarily before the discovery of electrons to permit mathematical analysis of circuits. electron current flow was defined after the discovery of electrons.
When there is a break on the circuit what is the reading?
The typical answer is current is zero when there is a break in the circuit. It depends on the complexity of the circuit, there may be other paths for the current to flow, such that if there is a break in one part of the circuit, the rest of the circuit still has current flow (but a different value than designed).
If you are reading voltage, and there is a break then that will change, also depending on the complexity. If it is a single loop, and you're reading voltage before the break, your voltmeter will read the same voltage as the voltage source, since there is no current flowing between any resistors between the meter and the source. If you're reading voltage after the break then the meter will read zero (0) volts.
What is the operation of Mosfet?
Depending on the type, in a simple explanation mosfets are similar to a relay, in the sense that when current is applied to one leg, the other two legs are connected together. Some mosfets also pass through the supplied current that closes the mosfet, and some do not.
You need to calculate the equivalent resistance. For instance, if the three resistors are connected in series, simply add all the resistance values up. Then, you calculate the current (in amperes) using Ohm's Law (V=IR); that is, you need to divide the voltage by the resistance.
How can you tell if a 3 prong outlet is grounded?
=== === Tie the bare ground onto the ground screw in the back of the box then tie green wire from outlet to bare ground with a "wire nut", also known as a "marrette", or with an equivalent kind of secure electrical connector.
=== === <><><> If you must go with a 3 prong outlet, ground the box. I would recommend a 4 prong outlet as it meets modern code and is safer.
<><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
How a transistor acts as an amplifier?
A transistor has three sections, an emitter, base, and collector. By extracting a small number of electrons from the base, a large # of electrons can flow across the transistor from the emitter, thru the circuit, and back to the collector.
What is ULN2003 integrated circuit?
as a buffer circuit... means whenever u need a high current....
e.x-> if u wnat to run a 12V relay using a PC parallel port(DB-25) output, u kan use such a TTL IC.... if u just connect the relay it will never switch!! the current in a parallel port output will just be enough to light 2 series LEDs....
ULN**** ICs are used in circuits that use PIC ICs(micro controller)..... Also ULN**** series ICs has low power dissipation...
-R-
A 2000 watt heater connected to a 120 volt circuit will draw a current of?
Current (amps)=Watts/Volts =2000/120 =16.75 =16.75 amps
What is tapping in transformer?
Transformers may be supplied with an LTC (load tap changer) that physically adds/removes windings from one side to control the voltage output of the transformer. If the LTC is moving, it is referred to as "tapping". An LTC has several discrete tap positions. The ones I see most often have 33, 16 up, 16 down, and a neutral.
What is the Effect of tolerance on power of the resistor?
For example, a "220 ohm" resistor with a tolerance of 10% (silver band) has an actual resistance somewhere between 198 and 242 ohms.
When is electrical energy transferred?
Through conduction and induction. Electrons stay generally in the same place while the energy is imparted through the wire. Resistors and capacitors deal with electricity in their own ways. Caps store and discharge energy while resistors can set voltage levels and current flow. In a transformer, two coils on a metal frame can impart their energy on one another, actually transfer it. This happens through the magnetic fields described by Faraday. The active elements in electronics are numerous but few effect the flow of electricity more than the modern transistor. It has almost totally supplanted the tube as a control device. The transistor can control large amounts of current in its' different iterations, the SCR, Triac, FET, IGT, etc.
When a parallel LC circuit is tuned to resonance will the current be at a maximum or a minimum?
Inside the circuit loop between the inductor and capacitor the current will be at maximum.
Outside the circuit the current through the LC tank circuit will be at minimum.
It depends on where you are measuring it.
What are the advantages and disadvantages of a series circuit?
The main advantage to wiring a circuit with multiple accessories and access points into a series is that one main switch can control them all. This can allow a single circuit breaker, fuse, or the operator to disable them all in one step.
What is the weakest link in an electric circuit a switch a receptacle the pilot lamp or the fuse?
The fuse, because it is expected to fail first on any fault.
