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What material that displays near zero resistance at a low temperature is called a(n)?
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What is the measure of how much a material opposes the flow of currenet called?
resistance
What is the increase in volume of a material due to a temperature increase is called?
thermal expansion
What is a material that does not let electrons travel through it?
Generally speaking, a material that does not let electrons travel through it, a material that has a very high resistance to electron flow (electric current), is called an insulator.
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 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.
What is the temperature coefficient of resistance?
The temperature coefficient of resistance is a number used to predict how the resistance of a material changes with changes in temperature. Typically the units are either resistance per temperature or 1/temperature depending on which equation is used for the calculations. For example, in copper the temperature coefficient of resistance is about 0.0039 per change in degrees Celsius. A positive temperature coefficient of resistance means that the resistance of the material will increase as temperature increases. As per the equation or say unit of resistance temperature coefficient, its definition can be given as below: " Rise in temperature per unit initial resistance, when temperature is raised by one degree Celsius is called the resistance temperature coefficient."
What factors contribute to the electrical resistance of a conductor?
1) What materials the conductor is made of;2) the average cross-sectional area along the length of the conductor;3) the temperature of a conductor also affects its resistance;4) the length of the conductor is also very important.Generally, the longer the conductor, the higher its resistance.Your students' course materials can probably give you a better answer than mine, or at least you'll know it is the right one.The length, the cross sectional area, temperature of conductor along with the intrinsic property called the specific resistance of the substance.
The opposition to the movement of charges flowing through a material is called what?
RESISTANCE.
What does resistance in wire depend on?
Resistance is directly proportional to the resistivity and length of the conductor, and inversely-proportional to its cross-sectional area. As resistivity is affected by temperature, we can say that temperature indirectly affects resistance.
What is a material that has no electrical resistance?
The class of materials called superconductors have no DC resistance when cooled below their transition temperature. This temperature varies with the material and is below 20K for metallic superconductors and generally below about 100K for oxide or "High Temperature" superconductors
What is the meaning of electrical resistance?
Definition Of Resistance In Electrical:Property of a material to oppose the flow of electric current through it is called Resistance.
What is pyroelectricity?
An element which displays electricity with change in temperature is called pyroelectric element.
What is pyroelectric element?
An element which displays electricity with change in temperature is called pyroelectric element.
What is the measure of how much a material opposes the flow of currenet called?
resistance
Is the continuous flow of charges through a material is called electric resistance?
No, it's called 'current'.
The rate at which charges move through a conductor is called?
there is no name for the rate of charge transfer, but its inverse is resistance: resistance is how much charge is resisted, so a low resistance material will have a larger rate of change of charge than a high resistance material.
What is swamping resistance?
(Electronics) Resistor placed in the emitter lead of a transistor circuit to minimize the effects of temperature on the emitter-base junction resistance and its resistance is called swamping resistance.
