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The resistance of a wire is determined by its material, length, cross-sectional area, and temperature. Higher resistance is caused by longer wires, smaller cross-sectional areas, higher resistivity materials, and higher temperatures. These factors affect the flow of electrons and ultimately the opposition to the current flow in the wire.
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What change to a wire would cause its resistance to decrease?
Decreasing the length or increasing the thickness of the wire would cause its resistance to decrease.
Describe how the electric resistance of a wire changes as the wire becomes longer. How does the resistance change as the wire becomes thicker?
As the wire becomes longer, its resistance increases because there is more material for the electrons to travel through. On the other hand, as the wire becomes thicker, its resistance decreases because there is more space for the electrons to flow, reducing the collisions with the wire material and therefore lowering the resistance.
If both the diameter of wire and its length were quadrupled what will happen to its resistance?
If both the diameter and length of a wire are quadrupled, the resistance of the wire will increase by a factor of 16. This is because resistance is directly proportional to the length of the wire and inversely proportional to the cross-sectional area of the wire, which is determined by the diameter. By quadrupling both, the resistance will increase by 4^2 = 16 times.
Would a long and thick wire have the greatest resistance?
No, resistance is primarily determined by the material the wire is made of, its length, and its cross-sectional area. A longer and thicker wire would actually have lower resistance due to more space for electrons to flow through.
Is electric resistance greater in a short fat wire of a long thin wire?
Electric resistance is greater in a long thin wire compared to a short fat wire, due to the higher resistance associated with longer wires and thinner cross-sectional areas. Resistance is determined by the material's properties and dimensions, with length and cross-sectional area being key factors affecting resistance.
What is the cause of resistance and how the resistance and how the resistance of a wire can be determined?
Electrical resistance can be determined by the equation that defines resistance - Ohm's Law. Just divide the voltage across a resistor, by the current passing through it.
What change to a wire would cause its resistance to decrease?
Decreasing the length or increasing the thickness of the wire would cause its resistance to decrease.
Describe how the electric resistance of a wire changes as the wire becomes longer. How does the resistance change as the wire becomes thicker?
As the wire becomes longer, its resistance increases because there is more material for the electrons to travel through. On the other hand, as the wire becomes thicker, its resistance decreases because there is more space for the electrons to flow, reducing the collisions with the wire material and therefore lowering the resistance.
If both the diameter of wire and its length were quadrupled what will happen to its resistance?
If both the diameter and length of a wire are quadrupled, the resistance of the wire will increase by a factor of 16. This is because resistance is directly proportional to the length of the wire and inversely proportional to the cross-sectional area of the wire, which is determined by the diameter. By quadrupling both, the resistance will increase by 4^2 = 16 times.
Would a long and thick wire have the greatest resistance?
No, resistance is primarily determined by the material the wire is made of, its length, and its cross-sectional area. A longer and thicker wire would actually have lower resistance due to more space for electrons to flow through.
Is electric resistance greater in a short fat wire of a long thin wire?
Electric resistance is greater in a long thin wire compared to a short fat wire, due to the higher resistance associated with longer wires and thinner cross-sectional areas. Resistance is determined by the material's properties and dimensions, with length and cross-sectional area being key factors affecting resistance.
Why bends in a wire do no affect its resistance?
Bends in a wire do not affect its resistance because the cross-sectional area and length of the wire remain the same regardless of the bends. Resistance is determined by these two factors, according to the formula R = ρ*(L/A), where ρ is the resistivity of the material, L is the length of the wire, and A is the cross-sectional area. As long as these parameters remain constant, the resistance of the wire will stay the same.
What is the cause of resistance and how the resistance of wire can be determind?
The cause of resistance is the opposition to the flow of charges.Resistance occurs due to the collisions between charges inside a substance. The resistivity of a wire can be found out by using a meter bridge or a slide wire bridge.
Why the thin wire has grater resistance to electricity?
it has to do with ohms and the gauge of the wire. if you have a low ohms then you can't use a small thin wire. because the more ohms the more resistance. if you have a low omhs on a thin wire it can cause the wire to heat up. posibly catch fire.
Do bend in the wire effect the electric resistance?
Yes, bending the wire can potentially affect its electrical resistance. The resistance of a wire is influenced by its dimensions, material, and temperature. Bending a wire can alter its cross-sectional area, length, or even cause deformations that impact the flow of electrons and increase resistance.
What would happen to the resistance if a soft iron core was energised with steady dc?
The resistance would remain the same because it is determined by the material and dimensions of the wire, not the presence of an energized soft iron core. The core would become magnetized and the magnetic field around the wire would change, but this would not directly affect the resistance of the wire.
Electric current flows in a wire which is opposed by what?
Electric current flowing in a wire is opposed by electrical resistance. This resistance is caused by factors such as the material of the wire, its length, and its cross-sectional area. It results in the conversion of electrical energy into heat.
