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Primary Factors:
For a simple system like an electrical wire, there are three major things which will affect the electric resistance.
1. Resistance of wire conductor depends upon the material of which it is made.
2. Resistance of wire conductor is directly proportional to its length.
3. Resistance of a wire conductor is inversely proportional to its area of cross-section. (At least for low frequency voltage.)
Additional:
In general every material has a characteristic electrical conductivity (and resistivity) which determines how well it will conduct electricity. Metals have very high conductivities and insulators very low. The geometry of an object affects the resistance with the above-mentioned wire geometry being the most important example.
In general the type of material and the geometry are the primary factors in determining the resistance of an object, but there are other effects worth mentioning.
Temperature can change electrical properties of a material and there are some dramatic examples such as superconductors. Semiconductors can also have important temperature dependent properties. For most generic materials there is a rise in resistance with an increase in temperature but the effect is not usually large.
More exotic phenomena also exist, such as the change in resistance due to a magnetic field or nonlinear conductors which do not have a fixed resistance but rather have a resistance that depends on voltage. Conductivity through a gas is a dramatic example of the latter.
Electrical resistance is affected by the material of the conductor, its length, its cross-sectional area, and its temperature. Additionally, the presence of impurities or defects in the conductor can also impact resistance.
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What is the opposition to the flow of electrons is called?
Resistance, or electrical resistanceResistance, or electrical resistanceResistance, or electrical resistanceResistance, or electrical resistance
What is the formula for electrical resistance?
The formula for electrical resistance is R = V/I, where R is resistance in ohms, V is voltage in volts, and I is current in amperes.
Does sugar create electrical resistance?
Sugar is not used in electrical circuits.
Examples of electrical resistance?
The filament in an incandescent light bulb resists the flow of electricity. Copper wire has relatively low electrical resistance, making it a common choice for transmitting electricity. Insulators, such as rubber or plastic, have high electrical resistance, which prevents the flow of electricity.
What are some examples of items with low conductivity?
Thermal resistance: diamond Electrical resistance: copper Optical resistance: quartz
What affects the electrical resistance of a body?
The electrical resistance of a body is affected by the material it is made of, its length, cross-sectional area, and temperature. Materials with high resistivity, longer lengths, smaller cross-sectional areas, and higher temperatures will have higher electrical resistance.
How does the size of the wire affect the electrical resistance?
The size of the wire directly affects the electrical resistance. Thicker wires have lower resistance compared to thinner wires, as there is more space for electrons to flow through, reducing the resistance. Conversely, thinner wires have higher resistance due to smaller pathways for electron movement.
What are the four factorws affecting electrical resistance?
There are really only three things that affect electrical resistance. They are the length and cross-sectional area of a conductor and its resistivity. However, resistivity depends not only on the material from which the conductor is manufactured, but upon its temperature. So you could say that temperature indirectly affects resistance via its resistivity.
What measures electrical resistance?
an ohm meter OR multimeter is used to measure the electrical resistance...
The electrical resistance of circuit is influenced by three primary factors?
Resistance is directly proportional to the resistivityand length of a material, and inversely-proportional to its cross-sectional area. It should also be noted that its resistivity is affected by temperature, so temperature indirectly affects resistance.
Who when and how was electrical resistance discovered?
electrical resistance was discovered by Georg Ohm in the late 1820's.
Do bends in a wire affects its electrical resistance?
Unless the wire is broken, a bent wire should still be able to conduct electricity as well as a straight one.
What is resistance expressed in?
Electrical resistance is measured in Ohms.
How does surface area affect air resistance?
air resistance affects
What is the opposition to the flow of electrons is called?
Resistance, or electrical resistanceResistance, or electrical resistanceResistance, or electrical resistanceResistance, or electrical resistance
Resistance is a energy?
Resistance is not energy; it is a property that opposes the flow of electric current in a circuit, leading to the dissipation of electrical energy in the form of heat. Energy is the capacity to do work or produce heat, and resistance is one factor that affects the amount of energy that is dissipated in a circuit.
What is excessive electrical resistance?
High resistance means insulation
