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Which wire would have the lowest resistance a long thin iron wire at a high temperature or a short thick copper wire at a low temperature?
Wiki User
∙ 12y ago
Copper will.
Wiki User
∙ 12y ago
Team R6
go study not look the answer up muffin head
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Open circuit and short circuit test?
Open circuit means the circuit is not continuous . A short circuit is continuous but has a fault connecting between either live to neutral or earth .As result of this we saw that this answer is unsufficent to explain short and open circuit on the other hand you can use this answer also like i did:)
What is the short version of the definition of weather?
The short Version of the Definition of Weather is: temperature.
A copper wire was left connected from one terminal of a battery to the other The wire became very hot Why did the wire get so hot?
The wire acted as the load across the battery terminals. Small short pieces of wire have a very low resistance. Ohms law states I = E/R. Current is directly proportional to the voltage and inversely proportional to the resistance of the circuit. So in other words if the resistance goes low the current (amperage goes high) It is this high current flowing through the wire that makes the wire hot. The higher the resistance the less of a current flow through the wire.
What is the meaning of short circuit conductor?
A short circuit conductor is just a conductor in an unexpected location, often with much lower resistance that is expected for the normal load.
What is a short circuit how does it happen and why is it dangerous?
A short circuit is when the current in a circuit flows directly from the live/phase conductor to the neutral conductor without passing through a load. This is dangerous because the amount of current in a circuit is determined by the resistance/impedance (assuming constant voltage). The resistance of the conductor is very low and this allows large amounts of current to flow which should operate the circuits protective device (fuse). In the absence of a protective device the current will cause the conuctor toheat up first producing fumes from burning insulation and eventually seting on fire.
Does a short copper wire have more resistance then a long one?
No. Other things being equal, a long wire has more resistance than a short wire.
Why doesnt a field coil in a DC shunt motor lead to short ciruit when it is a fact that an INDUCTOR is a short circuit to DC?
Yes, an inductor is a short circuit to dc...that's true....IF the inductor is an ideal one, that is, the inductor has no resistance but has inductance only. Anything in real world, as you know, is not ideal. An inductor is usually made of a copper wire. A copper wire has its own resistance. If an inductor coil is thin and long (i.e. many turns), it will provide an appreciable resistance to DC, and will no longer be a short circuit.
What does resistance depend on?
Resistance depends on the thickness and length of the wire used, as well as the conductor used. For example, a short, thick wire made of copper will conduct electricity better than a long, thin wire made of, say, iron.AnswerResistance is directly proportional to the length and inversely proportional to the cross-sectional area (not 'thickness') of a material. Its constant of proportionality is called resistivity which is affected by temperature -so temperature indirectly affects resistance.
Which conditions make resistance small?
The resistance of a wire is the length divided by the cross-section area and the conductivity of the material. So for small resistance you need a wire with short length, large cross-section area (diameter) and a material with high conductivity like copper.
If current equals voltage divided by resistance wouldn't current at 0 resistance or short circuit be infinity?
Theoretically yes. However, there is always resistance through joints,components and trace impurities in wires. A dead short is only a dead short for an instant at a fixed temperature. As heat rises so does resistance. Consequently current falls. also, resistance of zero would violate the laws of thermodynamics, because it would imply zero entropy
What happens to resistance of the wire if the wire is short?
Short wire has less resistance Long wire has more resistance Thick wire has less resistance Thin wire has more resistance
What is the primary advantage of PEX pipe?
There are too many:CostFlexibilityResistance to corrosionLess fittingsBetter resistance to freezingComes in continuous coils rather than 10ft short piecesLightweightEasier to install than copper and CPVC
Is the current pass through parallel short resistance?
no.because current always try to flow trough low resistance path.as short circuit has low resistance current pass trough short circuit
What is the use of resistance?
In electronic circuits, resistance is used to empede the flow of current. You may want a specific voltage at a given location, so by using resistors, you can obtain that voltage. You may want to limit current, which a resistor can do for you. But resistance is inherent in everything. Copper wire has resistance, your toaster is really nothing more than a resistor. Resistance is generally considered the load in electrical systems. If it were not for resistance, everything would be considered a short circuit. So you see resistance, although many times not desired, is required.
Why resistance is high during short circuiting?
Resistance of a short circuit is actually very low, ideally it is 0 Ohms. In practice the resistance of a short circuit will be equal to whatever the resistance of the short circuited wires is, which is typically very small. So if you substitute very small resistance value R into Ohm's Law(I = V/R), you will get a very high current flowing. Where V=voltage,I=current.
What is the value of the resistance of an short circuit?
ohms
The value of resistance of an short circuit?
The value of resistance when there is a short circuit varies depending on the nature of the fault, but it could be fractionally above zero or higher.
