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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.
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Would a hotter wire have a higher or lower resistance than cooler wire?
A hotter wire will typically have a higher resistance than a cooler wire. This is because as the temperature of a wire increases, the atoms inside the wire vibrate more vigorously, increasing collisions with free electrons and hindering the flow of electric current, thus increasing resistance.
What happens to resistance of the wire if the wire is short?
If the wire is short, its resistance will likely decrease. A shorter wire has less length for electrons to travel through, resulting in lower resistance according to the formula R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area.
How does the thickness of wire affect the resistance?
Thicker wire has less resistance than thinner wire due to lower electrical resistance. Thicker wire allows more electrons to flow through it easily, resulting in less opposition to the flow of electric current.
Is the wire gets thicker or thin when the resistance is less?
The wire gets thinner when the resistance is less because there is less opposition to the flow of electrons, which results in less heat generation. This reduced heat generation allows for a thinner wire to be used without overheating.
What happens to the resistance of a filament if it is replaced by a shorter wire?
If a filament is replaced by a shorter wire, the resistance will decrease. Resistance is directly proportional to the length of the wire, so a shorter wire will have lower resistance. This is because there is less material for the electrons to travel through, resulting in less opposition to their flow.
Would a hotter wire have a higher or lower resistance than cooler wire?
A hotter wire will typically have a higher resistance than a cooler wire. This is because as the temperature of a wire increases, the atoms inside the wire vibrate more vigorously, increasing collisions with free electrons and hindering the flow of electric current, thus increasing resistance.
What happens to resistance of the wire if the wire is short?
If the wire is short, its resistance will likely decrease. A shorter wire has less length for electrons to travel through, resulting in lower resistance according to the formula R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is cross-sectional area.
How does the thickness of the wire affect resistance?
A thicker wire has less resistance than a thinner wire.
How does the thickness of wire affect the resistance?
Thicker wire has less resistance than thinner wire due to lower electrical resistance. Thicker wire allows more electrons to flow through it easily, resulting in less opposition to the flow of electric current.
Is a wire thick with low electric resistance?
A wire that is thicker than another wire of the same material has less resistance
Is the wire gets thicker or thin when the resistance is less?
The wire gets thinner when the resistance is less because there is less opposition to the flow of electrons, which results in less heat generation. This reduced heat generation allows for a thinner wire to be used without overheating.
What happens to the resistance of a filament if it is replaced by a shorter wire?
If a filament is replaced by a shorter wire, the resistance will decrease. Resistance is directly proportional to the length of the wire, so a shorter wire will have lower resistance. This is because there is less material for the electrons to travel through, resulting in less opposition to their flow.
Does the diameter of the wire affect resistance?
Yes. Other things being equal, a thicker wire has less 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.
Which material has a greater resistance aluminum or copper wire?
Copper wire has greater resistance than aluminum wire. This is because copper is a better conductor of electricity than aluminum. This means that copper wire will have less resistance and will be able to carry more current with less energy loss.
What resistance of a connecting wire is less than the resistance of a resistor?
The resistance of a connecting wire that is less than the resistance of a resistor would depend on the materials and dimensions of the wire and resistor. Generally, most connecting wires have very low resistance compared to resistors. Copper wires, for example, have low resistance and are commonly used for connecting circuits.
How are resistance and the diameter of a wire related?
Resistance is inversely related to the diameter of a wire. A larger diameter wire will have less resistance compared to a smaller diameter wire, assuming other factors like length and material remain constant. This is because a larger diameter wire provides more space for electrons to flow through, resulting in less resistance to the flow of current.
