Electrical Resistivity and Electrical Conductivity
The factor(s)...
Question
The factor(s) affecting the resistance of a conductor is/are:
A
Length of the conductor
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B
Area of cross-section of the conductor
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C
Material of the conductor
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D
Color of the conductor
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Solution
The correct options are A Length of the conductor B Area of cross-section of the conductor C Material of the conductor The resistance of a conductor of length, l and cross-sectional area, A is given by R=ρlA where ρ is the resistivity. Factors affecting the resistance of a conductor are:
Length of the conductor - Resistance is directly proportional to the length of the conductor.
Area of the cross-section of the conductor - Resistance is inversely proportional to the cross section area of the conductor.
Material of the conductor - Resistance depends on the material of conductor. It is quantified by resistivity. Resistance is directly proportional to resistivity.