What are some safety issues of Inductors and Capacitors?
930867
Capacitors = stored energy, leaking dieletric (if hazardous), and/or reverse polarity may cause rupture/failure. Over-voltage can cause failure also. Always store de-energized and shorted.\n\nInductors = No hazard if de-energized. Inductors in service with an over-current condition can overheat and cause burns or failure of the component.
101578
They have no value and are actually a liability because of environmental hazzardous material such as lead. You need to dispose of them properly if you love your mother earth and its other inhabitants.\n\nAny process to recover anything of value, such as silver or copper, costs more than is gained.\n\nUnless you happen to have a budding engineer child or know one in the neighborhood, they would have great fun poking around it although it may not be the safest thing in the world. Don't let them have the giant capacitors in there!
558632
Yes it is perfectly safe, The device will only draw the current it requires. So as long as you are providing at least 300mA the device will operate without being damaged.
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....
348214
1.  not enough info\n2.  conduction?\n3.  conductor\n4.  resistance
736497
The capacitance causes leakage as the other answer says.\n\nThis capacitane creates problem in your calculations. Say, if there were only resistance in junction, then you can determine the performance of the junction at different operating voltages easily [hold temperature at fixed value].\n\nBut, capacitance causes the frequency dependance. So, the junction impedance becomes non-linear with the operating frequency. So, calculations are complicated.
129665
A power supply needs a "load" to run,,I.E.  all that stuff in the computer box.  Some have internal fuses that will blow and you have to open the supply box to check,,There is a 110/220 switch that may have been moved,, I have never had one that I had to mess with jumpers,,  yes, a factory defect is possible,, cold solder joints on large components are quite common coming out of the factory..
426575
Your question is confusing, but here I go.\n\nTo have zero current the circuit must be open.\nThat will give you the higher voltage.\nNow if you have a capacitor circuit, when you close the circuit will take some time to be zero current, while the capacitor charges.\nIn a inductor circuit the current is not possible to be zero because of the nature of the circuit, but will be near zero .\n\nIn a resistor circuit, the current never will be zero, the energy will become heat.\n\nso what are you trying to answer ???
437979
I really dont think so, i mean if you are talking about em waves given off by electrical equipment of this kind then no.  The only concern with such equipment is that all the connections are properly in place and there is no lose wiring sticking out of it so that it is earthed properly and completely safe.
882906
Well depends on the max load the circuit can handle. If the circuit can sustain a max load of lets say 10 volts and you push 15 to it, the circuit elements will heat up and fry. Of those elements will include inductors, transformers (up and down) logic controllers, resistors, transistors, capacitors, motors, and a multitude of other components. Lets say computer for example, you would fry the CPU and possibly damage all the attached components! Either way it's a bad situation.\n\nJust increasing the the resistance values of the resistors will not prevent damage. The designing of circuit boards isn't a fly by night type of thing. In some cases you can get seriously hurt or waste alot of money so exercise caution. Good luck.
455603
If it's for a simple hobbyist application they need to know only the resistance value and its power rating.\n\nA full specification would also include:\n\ntolerance,  thermal coefficient,  maximum voltage.
925425
If you want to build it to a specific value, I recomend getting a copy of The Radio Amateurs Handbook from your local library.  It has info and formula for air core, ferrite core, and toroid core inductors.  You might try their website www.arrl.com
424835
(m)\n\nIn large computers, neutral to ground voltages are originated because nonlinear currents flow through the neutral wire. In general always when there is some current flowing in neutral wire, there will be a ground ot neutral wire voltage difference on output end, because there is no current flowing on ground wire. In some computer systems the voltage differences are considered to be problem, because it has been reported to cause cause improper behaviour like "hangouts" on some computer systems. \n\nIt is true that in some special cases neutral to ground voltages can cause this kidn of problems, but in those cases it is not to blame the separate wires, because the problem lies in some other place. In properly built electrical wirign network, the neutral to ground voltage differences will never be more than few volts and any properly designed electrical equipment should not be disturbed of this kind of small voltage differences. \n\nIf the equipment gets disturbed of this small main frequency voltage, claim the manufacturer/designer of that particular equipment for doing bad job. Computer equipments can be easily deigned to cope few volts of voltage differences between neutral and ground. Most of the modern euquipments are designed to cope this. \n\nIf the voltage difference between your neutral and ground is much larger than few volts or there is very good propability that there is somethign wrong on you main wiring. So it is best that an electrician goes and checks your wiring before more problem and damages happen. \n\nIn some cases the neutral actual to ground voltage is not the problem, but the wavefor of the voltage. Non-linear loads like computer power supplies and light dimmers can cause some considerable noise between neutral and ground. Such noise can be more problematic than just a simple voltage difference, but equipment should still be able to cope quite fair amount of it (EMC regulations etc.). If you have considerable amounts of noise on neutral wire used by nonlinear loads, then you can again blaim the improper design of the electrical wiring. This kind of problems can be solved by good wiring design practices: separate electrical wiring from main panel/transformer to the equipments which cause noisen and to equipments which are sensitive to it. This is good practice and keep problems away. \n\nIf you would have on those cases had a wiring with common neutral and ground wire, you would have terrible ground potential diffeences between different outlets. In cases were ther problems neutral to ground voltage differences in separate ground and neutral wire wiring start cause problem, a wiring with common ground+neutral wire there would be so much ground potential differences between outlets that any equipments connected to different electrical outlets and interconnected would work very erratically, you would propably cause many equipment damages. Computer sustems are generally much more sensitive to the ground potential differences than ground to neutral differences. \n\nThe bottom line is that separate ground and neutral wire is a good thing for many problems. It solves more problems that what it potentially causes. And in wery rare situations where separate ground and neutral wires cause some problems, in those same situations a wiring with connon neutral+ground wire would have caused much more but different kind of problems in form of ground potential differences. When taking account situation where computers are interconnected/networked, a good stable ground potential for aal equipment is much more important than very small neutral to ground potential. Separate ground and neutral wires is a good method to keep the outlet grounds at same potential, which is very important in networked computer systems.
728562
Here is a good article. To understand them, you need to get a multimeter, and electronics projects book, a breadboard (to mount circuits on), and a selection of electronic parts from Radio Shack. Use batteries initially, and then when you are more confident a power supply and rectifier to do experiments, and measure voltage, current, and resistance values around the circuit.\nhttp://en.wikipedia.org/wiki/Electronics\nHyperphysics. (Google)\nhttp://www.mathworld.wolfram.com\nhttp://www.refdesk.com\n"You can do it electronics," Needham Heights, MA\nEnjoy!
470470
I'd like to know exactly what you're trying to do. Using the wrong type of capacitor or one with the wrong values could explode and burn. I'm talking about a pretty violent explosion at 110 VAC!  A Snubber will not work because that is now what they are for. A snubber is used on the gate of SCRs to prevent false retriggering especially on high power circuits. What you need is a Thermistor. This is a flat round device with two wires coming out of the edge. The thermistor will be put in series between the power switch and the capacitor. At normal room temperatures the thermistor might have about 50 Ohms of resistance. When it warms up, (almost instantly), the resistance drops to about zero. This action limits and controls the initial power surge into the capacitor when the switch is thrown thereby preventing damage to the switch. You need to know the voltage and current load to select the right thermistor otherwise it becomes smoke.\n\nPlese use caution: Capacitors can store huge amounts of power and will COMPLETELY DISCHARGE IMMEDIATELY.\n\nA large capacitor, when shorted out, can blow a 1/4 inch screwdriver in half! Sounds cool but the missing part is burning molten metal flying at you! Please be Careful!
211231
It depends on both the type of current and the circuit.  For example, AC and DC currents passing through a circuit with reactive elements (capacitors and inductors) will much diffreently from one another.... Ohm's law always applies however...
561380
i don't know if you should even attempt that.  there have been many accidents with those exploding and overheating and such... it may not be safe to try to rewire one of those on your own.