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Resistance is the opposition to the flow of electrons (i.e. electrical current) in a conducting material such as a metal wire or a pair of contacts in a switch. Every substance has a certain amount of resistance. Resistance is measured in ohms. If one volt can push 1 amp of current through a substance, it has a resistance of 1 ohm. Some materials, like copper and aluminum have fairly low resistance, and are therefore used as electrical conductors (wires).
Another answer
Conductor resistance means a material's opposition to the flow of current that a conductor has. Ideally, in a wire, this should be nothing, i.e. 0 ohms, but in reality all conductors have a certain amount of resistance. For example, 1000 feet of 14 AWG (the common wire size used for 15 amp branch circuits in residential wiring in North America) has about 2.5 ohms of resistance.
Further answers
Think of a conductor as a resistor/resistance of a certain very low value in series with whatever load it is feeding. Current flowing through the conductor(s) will result in a voltage drop and power loss, manifested as heating of the conductors. The "line loss" formula is one variation of the power formula and is P = I2 x R, which can be used for calculating the power loss in the conductors. Remember that any power line to a 120 volt device has 2 lengths of conductor going to it (hot and neutral return). Therefore the total conductor length is the length of the power cord or electrical cable times 2.
To calculate the voltage drop across the conductor resistance for a given current, you have to determine the conductor's resistance and use Ohm's law.
Calculating the resistance of a length of conductor can be done using tables readily available in textbooks or via a websearch, assuming copper conductors at 20 degrees Celcius. You need to know the size of the conductor (AWG size, for American wire gauge) and the length of the conductor.
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∙ 10y ago
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∙ 15y agothe measure of the voltage which has passed through the conductor? More precisely, the resistance is the ratio of voltage to current.
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∙ 11y agoElectrical resistance is measured in ohms.
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∙ 14y agoResistance in an electrical current is measured in Ohms (Ω)
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∙ 12y agoresistance by all mean limits the flow of any fluid, particles or charges. Electrical resistance limits the flow voltage for some specific reason. It is measured in ohms.
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∙ 10y agoThe electrical unit that is measured in Ohms is electrical resistance. Ohms is used to describe the resistance found between two conductors on a circuit.
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∙ 14y agoIt is the resistance.
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What is the opposition to the flow of the charge?
Electrical resistance, measured in Ohms
What is resistance?
Resistance is the opposition to flow or movement.Resistance in a a mechanical system could be friction, wind, gravity.Resistance can be opposition to a policy, or to an invasion (e.g. French Resistance).Resistance in an electrical circuit is the limiting or opposition to current flow. It is measured in Ohms.----Electrical ResistanceThe technical definition is "Electrical resistance is a ratio of the degree to which an object opposes an electric current through it, measured in ohms."In simplfied terms, electrical resistance is broadly equivalent to friction in a mechanical system. If you applied a voltage to a circuit with zero resistance then you would get an infinite current. In reality all circuits have some resistance which limits the current.We can predict the current in a given circuit using Ohms law:V = I x RWhere:V is Voltage (measured in Volts)I is current (measured in Amps)R is resistance (measured in Ohms)You will often see this in the form E = I x R. It is exactly the same thing, just a different convention where "E" is used for voltage instead of "V"Ohms law is:V=I/RV=Voltage (volts)I=Current (amps)R=Resistance (Ohms)Resistance in an AC circuit is called Impedance (Z)Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit.----------Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit.There are many different types of resistance, and I recommend that for starters you read up on the Wikipedia article on electrical resistance.http://en.wikipedia.org/wiki/Electrical_resistance
What units is to meausure a ohmmeter?
An ohmmeter measures electrical resistance. This is one part of "impedance", that prevents electricity from flowing freely from one part of a circuit to another. Resistance is measured in "ohms".
Is resistor measured in amps?
No, a resistor isn't measured at all. A resistor has a quality called "resistance" - and that value is measured. Resistance is measured in Ohms.
What is the unit of measure for electrical resistance?
SI Units: Ohms Linesh Chungath India
What is resistance expressed in?
Electrical resistance is measured in Ohms.
What is electrical onductance measured in?
Electrical conductance is the reciprocal of resistance and is measured in siemens (symbol: S).
Resistance is measured in what?
Electrical resistance (and impedance) is measured in ohms(Ω).
What measures electrical resistance?
an ohm meter OR multimeter is used to measure the electrical resistance...
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 measured in amperes a current voltage or an Resistance?
Electrical current is measured in amperes.
What is the opposition to flow of electric charge?
Electrical resistance, measured in Ohms
What are the three electrical guantities?
The three electrical quantities are current voltage and resistance. Current is measured in amperes (A) and is the rate at which electricity flows through a conductor. Voltage is measured in volts (V) and is the electrical force pushing the current through the conductor. Resistance is measured in ohms () and is the opposition to the flow of current. Current - measured in amperes (A) Voltage - measured in volts (V) Resistance - measured in ohms ()
What is the opposite to the flow of charges?
Electrical resistance, measured in Ohms
Electrical resistance is a property of conductors that is measured in units of?
Ohm
What is the opposition to the flow of the charge?
Electrical resistance, measured in Ohms
What the opposition to the flow of electric charge?
Electrical resistance, measured in Ohms
