Explanation: Copper, silver, and gold all conduct electricity. Therefore, the material that would provide the most resistance for electricity would be plastic.
What is electrical resistance of a material?
Definition of Electrical Resistance
Resistance (also known as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. … Hence resistance is defined as the ratio of the applied voltage to the current through the substance.
Which substance has highest resistivity?
Helium Has highest Resistivity.
Which change decreases the resistance of a piece of copper wire?
It is given by : So, it is clear that the resistance of the wire is directly proportional to the temperature. It we want to decrease the resistance of the piece, its temperature should be decreased. So, the correct option is (3) ” decreasing the wire’s temperature “.
What four things does the resistance of a wire depend on?
The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity. It is important to note that electrical conductivity and resistivity are inversely proportional, meaning that the more conductive something is the less resistive it is.
What material has lowest electrical resistance?
The Resistivity of Various Materials
A material with low resistivity means it has low resistance and thus the electrons flow smoothly through the material. For example, Copper and Aluminium have low resistivity. Good conductors have less resistivity. Insulators have a high resistivity.
What is the resistance of steel?
Resistivity of some common materials
|Material||Resistivity (OHM-CMIL/FT)||Resistivity (10−6 OHM-CM)|
|Stainless Steel (304)||541||90|
|Steel (.5% carbon)||100||16.62|
What is the difference between resistance and resistivity?
Also, resistance is an aspect that opposes the flowing of free electrons. In contrast, resistivity is any material’s property that tells the resistance of the material with a particular dimension.
Difference between Resistance and Resistivity.
|Dependence||Temperature, Length, Cross sectional area of conductor||Temperature|
Which copper wire would have the highest resistance?
A long and thin wire of copper will have a higher resistance while short and thick wire will have low resistance.
What happens to the resistance R of a copper wire as its diameter decreases?
Resistance is inversely proportional to the cross-sectional area. So if the diameter is halved the cross-sectional area is quartered and the resistance is quadrupled. I hope you got the answer to your question.