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Ideally, an electrical fuse should not have a high resistance.
It will generally have some, because the way most cartridge fuses work is by heating a thin filament to the melting point when a certain current flows through it. The heating is resistive heating, which is given by the equation P = I2R, or power = the square of the current times resistance.
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The above is 100% correct, I just want to add: A fuse does not reduce the power in any way, It simply does not allow too much power to be taken.
Example: You can use A 100amp fuse on A 10amp motor, The power supply will be 10amps because that's all the motor requires, but if there is a short or the motor is over worked the fuse will allow more chance of damage because its way too big for the job.
Another: If A 10amp fuse is used to protect A 100amp motor the motor will blow the fuse everytime its terned on, because the fuse will not allow the motor the necessary power to opperate.
What else can I help you with?
What is effect of temperature on resistance of a wire?
As temperature increases, the resistance of a wire also increases. This is because as the temperature rises, the atoms in the wire vibrate more vigorously, causing more collisions with electrons and impeding the flow of current. This relationship between temperature and resistance is known as the temperature coefficient of resistance.
What are the three factors that would give a piece of copper wire high resistance?
High resistance in a copper wire can be caused by factors like a longer wire length, a thinner wire diameter, and the material's high temperature, which increases resistance due to increased collisions among electrons.
What has a lower resistance a long thin iron wire at high temp or a short thick copper wire at low temp?
A short thick copper wire at low temperature would have lower resistance compared to a long thin iron wire at high temperature. This is because resistance is inversely proportional to cross-sectional area and directly proportional to temperature and length of the wire. The short thick copper wire has a larger cross-sectional area, which results in lower resistance.
Why in a wire the hotter it is the less resistance?
In a wire, as the temperature increases, the atoms in the wire vibrate more rapidly, which causes more collisions with the flow of electrons, increasing resistance. However, in some materials like metals, as temperature rises, the atoms also move farther apart, which can offset the increase in collisions, leading to a net decrease in resistance. This is known as the positive temperature coefficient of resistance.
Does a short copper wire have more resistance then a long one?
No, resistance depends on the material, cross-sectional area, and temperature of the wire. A shorter wire will have less resistance compared to a longer wire since it offers less opposition to the flow of electrical current.
What is effect of temperature on resistance of a wire?
As temperature increases, the resistance of a wire also increases. This is because as the temperature rises, the atoms in the wire vibrate more vigorously, causing more collisions with electrons and impeding the flow of current. This relationship between temperature and resistance is known as the temperature coefficient of resistance.
What are the three factors that would give a piece of copper wire high resistance?
High resistance in a copper wire can be caused by factors like a longer wire length, a thinner wire diameter, and the material's high temperature, which increases resistance due to increased collisions among electrons.
enameled aluminum?
Enameled aluminum wire has excellent high temperature resistance
What would reduce resistance in a copper wire?
Reducing the temperature of the wire will decrease its resistance. Also, using a wire with a larger cross-sectional area will lower resistance since there is more room for electrons to flow. Finally, using a more conductive material than copper, such as silver, can reduce resistance.
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?
The short thick copper wire at a low temperature would have the lowest resistance. Copper has lower electrical resistance than iron, and a shorter, thicker wire has lower resistance compared to a long thin wire, regardless of the temperature.
What has a lower resistance a long thin iron wire at high temp or a short thick copper wire at low temp?
A short thick copper wire at low temperature would have lower resistance compared to a long thin iron wire at high temperature. This is because resistance is inversely proportional to cross-sectional area and directly proportional to temperature and length of the wire. The short thick copper wire has a larger cross-sectional area, which results in lower resistance.
Why is the resistance of wire greater at a higher temperature?
there are a couple ways to look at this easiest is that the increase motion of the metal atoms/molecules makes it more difficult for electrons to find a "path" across the wire. another way is that it is harder to knock off the inner orbit e-'s at a higher temperature because all the outer ones have been stripped due to molecular bumping at high speed
Why in a wire the hotter it is the less resistance?
In a wire, as the temperature increases, the atoms in the wire vibrate more rapidly, which causes more collisions with the flow of electrons, increasing resistance. However, in some materials like metals, as temperature rises, the atoms also move farther apart, which can offset the increase in collisions, leading to a net decrease in resistance. This is known as the positive temperature coefficient of resistance.
How does temperature affect resistance of a wire?
If you are asking if a hot wire has a greater resistance than a cold wire then the answer I would say is yes. Cold wires have always had less resistance than hot wires
Explain how the resistance of a wire varies with its length?
The resistance of a wire is a measure of how difficult it is for electricity to flow through the wire. The resistance of a wire is inversely proportional to its cross-sectional area and directly proportional to its length. This means that, all else being equal, the resistance of a wire increases as its length increases. There are several factors that can affect the resistance of a wire, including the type of material the wire is made of, the wire's cross-sectional area, and the wire's temperature. The resistivity of the material the wire is made of is a measure of how easily electricity can flow through the material, and different materials have different resistivities. For example, copper has a lower resistivity than aluminum, so a copper wire will have less resistance than an aluminum wire of the same size and length. In general, the resistance of a wire increases as its length increases because the electrons flowing through the wire encounter more and more obstacles as they travel through the wire. The longer the wire, the more obstacles the electrons must overcome, which increases the resistance of the wire. It is also important to note that the resistance of a wire is not a constant value, and it can change depending on the temperature of the wire. As the temperature of a wire increases, the resistance of the wire also increases. This is because the higher temperature causes the atoms in the wire to vibrate more, which makes it more difficult for the electrons to flow through the wire.
Does a short copper wire have more resistance then a long one?
No, resistance depends on the material, cross-sectional area, and temperature of the wire. A shorter wire will have less resistance compared to a longer wire since it offers less opposition to the flow of electrical current.
Does the temperature of the wire affect the current?
Yes, the temperature of the wire can affect the resistance of the wire, which in turn can affect the current flowing through it. As the temperature increases, the resistance of the wire also increases, which can reduce the current flow.
