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what is the relation between resistivity
resistance (R), length of conductor (d) and cross
section area (6) of the conductor ?
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Answer:
R=p×1/A
Explanation:
resistivity is a measure of the resisting power of a specified material to the flow of an electric current. So resistance is directly proportional to resistivity of material used.
R∝ρ
If length is larger then electron has to travel longer so resistance is directly proportion to length.
R∝l
If cross sectional area larger electron gets sufficient space for travel so resistance is inversely proportion to cross sectional area.
R∝1/A
hence
R=p×1/A
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