Question

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sub- sci 1​

Answer 1

Answer:

Resistance is defined as the property of the conductor which opposes the flow of electric current. It is also defined as the ratio of the voltage applied to the electric current flowing through it. The resistance of a conductor depends on the length, area of cross-section, and the nature of the material that is used in the manufacturing of the conductor. For a conductor, the resistance is directly proportional to the length of the conductor and inversely proportional to the area of cross-section.

Resistivity is defined as the resistance offered by the material per unit length for unit cross-section. The SI unit of resistivity is Ohm.meter. Resistivity increases linearly with temperature. The resistivity of conductors is low when compared to the resistivity of the insulators. Therefore, it can be represented as:

Resistivity of conductors < Resistivity of alloys < Resistivity of insulators.

Explanation:

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Answer 2

Explanation:

Resistance

conductor which opposes the flow of electric current

Resistivity

Material per unit length for unit cross section