Electricity always has to travel in a closed loop, or a "Circuit."
Consider, for example, the simple circuit of two bare copper wires connected to the terminals of a battery, and a lightbulb. If you were to touch the wires together at any point, it would create a closed loop between the battery terminals that circumvented the lightbulb entirely. Thus, instead of flowing across the filament in the bulb, the current would travel between the two wires at the point of contact., and the bulb would go out. This is a "Short circuit."
Short circuits are usually caused by accident. For example, if the insulation on an electrical cord melted, or became stripped or frayed off, the bare wires might come in contact, creating a "short", and preventing whatever it was from getting any current.
Shorts circuits are dangerous, because they may allow a larger amount of electricity to flow than normal, and cause wires to overheat, melt, and catch fire. Shorts can also cause electrical "arcs" that can start fires. Most electrical circuits have "fuses", or "circuit breakers"; switches that pop open whenever they detect a dangerous amount of current.
Some electronics have safety features that will deliberately form a momentary short, if there is an above average voltage or current flowing through a highly sensitive device. One example of this is the "surge protector strip" that your computer probably plugs into.
~Donkey Hotei
2007-03-04 05:34:43
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answer #1
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answered by WOMBAT, Manliness Expert 7
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A short circuit is a conducting path between the two wires in a power system. Since it has a low resistance massive currents can flow through it until either a fuse blows, the wires in the wall catch on fire, or the short circuit melts.
It is not usually made on purpose since it has no practical application - it is a fault in wiring.
The easiest way to make one is to stick a pin through a line cord so it touches both conductors. When you plug that cord in there will be a short circuit that will have a current flow that is high enough to do damage. If the circuit's fuse does not blow fast enough you will either burn yourself severely or get electrocuted, depending on what you are near and what you are touching. Not a good outcome obviously.
2007-03-04 20:34:51
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answer #2
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answered by Rich Z 7
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Shortest connection! usually with the least resistance (a wire or any other conductive material) than the healthy circuit . Most of the times this very low resistance leads the source current to an unwanted destination like earth, hence a great amount of current flowing in this path which is called short circuit current.
2007-03-04 15:42:46
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answer #3
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answered by Kaveh 1
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Any time a circuit is interrupted from completing its designed path to its destination by grounding, it is called a short circuit. With the circuit fused, install a wire and switch to ground. With the circuit energized, throw the switch and the fuse will blow.
2007-03-04 13:39:53
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answer #4
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answered by itsbob1 5
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shortcircuit is when a low-resistance connection is established by accident or intention between two points in an electric circuit. the current tends to flow through the area of low resistance, bypassing the rest of the circuit. its not a good thing. it usually fries whatever electronic device you're using.
dumping a liquid or sending too much electricity through something can shortcircuit it.
2007-03-04 13:36:56
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answer #5
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answered by Kevin 2
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In 'short' , I suggest you look this up on Wikipedia for an extensive answer as not sure how much background you know already. See the link below.
http://en.wikipedia.org/wiki/Short_circuit
2007-03-12 11:16:40
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answer #6
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answered by alshialwil 2
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