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What is an electrical conductor that has very low resistance to current at low temperatures called?
Wiki User
∙ 14y ago
You're thinking of a "superconductor", but the real definition is far more bold.
A superconductor isn't a substance that has "very low" resistance at low temperatures.
It's one that has NO resistance at very low temperatures. None whatsoever. I mean, literally,
you can make a coil of wire out of this stuff, keep it super-cold, pump an electric current into the
wire, and connect the ends together, and the current is still flowing around the coil months later !
I know it sounds incredible, but that's exactly what they do every day, in CT and MRI machines.
Wiki User
∙ 14y ago
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When current passes through a conductor what makes the conductor heat up?
The electrical resistance of the material. All materials have some electrical resistance except for superconductors.
What makes a current lower and generates more heat?
The resistance of the electrical conductor, eg a wire, reduces the current which can flow in the circuit. The remaining current which does flow generates heat, representing the electrical energy which has been lost in overcoming the resistance.
What is the electrical resistance measured in?
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.
If conductor pass energy then my question is that heat energy change int electrical of wire?
Conductor losses or "I squared R losses" occur when electric current flows through a conductor. Conductor loss in watts equals the square of the current in amperes (I2) multiplied by the resistance of the conductor in ohms (R), and each watt of electrical energy is equal to 1 joule of heat.
What is a material that will carry an electric current called?
A material that will carry an electric current is called a conductor. Conductor materials have high electrical conductivity, allowing the flow of electric charges with minimal resistance. Examples of conductors include metals such as copper, aluminum, and silver.
The current in an electrical conductor varies inversely as the resistance of the conductor The current is 2 amperes when the resistance is 960 ohms What is the current when the resistance is?
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When current passes through a conductor what makes the conductor heat up?
The electrical resistance of the material. All materials have some electrical resistance except for superconductors.
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 path that an electrical current travels?
electric current
What may cause an electrical conductor to heat up?
An electrical conductor may heat up due to excessive current passing through it, which increases its resistance and generates heat. Poor connections, overloading, or inadequate conductor size can also cause heating. This can lead to a potential fire hazard if not addressed.
What makes a current lower and generates more heat?
The resistance of the electrical conductor, eg a wire, reduces the current which can flow in the circuit. The remaining current which does flow generates heat, representing the electrical energy which has been lost in overcoming the resistance.
What is the resistance value?
Electrical resistance is measure in Ohms. A function of voltage divided by current. It is also dependant on the length and cross sectional area of the conductor.
Why is a resistor called so?
I resistor is called so because it provides electrical resistance (measured in ohms). Electrical resistance describes how an electrical conductor (a wire) opposes the flow of an electrical current (flow of electrons). To overcome this opposition a voltage (a energy) must dropped (used) across the conductor (wire).
What is an electrical OHM?
A measurement of electrical resistance. It is dimensionally equivalent to Volts / Amperes. (Voltage / Current)AnswerAn ohm is the unit of measurement of resistance. Resistance is not affected by either voltage or current, but by the length, cross-sectional area, and resistivity of the conductor.
What is the difference between current and electricity?
The word Current is a term used to describe the characteristics of electricity, the same way voltage and resistance are used. As an example: voltage is a difference in potental and is often considered the amount of pressure pushing an electrical charge or certain number of electrons through a conductor. This electrical charge is called current. Any conductor has resistance to the flow of charge or current. If for example a conductor has a resistance of 2 ohms and a voltage of 12 volts is applied the resulting current flowing in the circuit can be measured to be 6 ampere..the unit for current. Current is therefore, considered the intensity or amount of charge.Electricity then is the movement of this current of charge The word Current is a term used to describe the characteristics of electricity, the same way voltage and resistance are used. As an example: voltage is a difference in potental and is often considered the amount of pressure pushing an electrical charge or certain number of electrons through a conductor. This electrical charge is called current. Any conductor has resistance to the flow of charge or current. If for example a conductor has a resistance of 2 ohms and a voltage of 12 volts is applied the resulting current flowing in the circuit can be measured to be 6 ampere..the unit for current. Current is therefore, considered the intensity or amount of charge.Electricity then is the movement of this current of charge
Which is an example of a superconductor?
A superconductor is a material with extremely low resistance to an electrical current. Many are metals or the like which have been supercooled to temperatures approaching absolute zero. Examples are mercury, lead and tin
How do you work out the current in a circuit?
we can calculate the current in a commmon electrical circuit by this formulae i.e,I=V\R where i is the current flowing in the conductor, R is resistance , V is the voltage.. THE FORMULA IS CORRECT but the term conductor does not suffice an explanation since a conductor is low in resistance R= resistance not conduction.
