Prove the relationship between Resistance and resistivity.
Asked by | 7th Aug, 2009, 07:02: PM
Resistance of a metal wire is found to be DIRECTLY PROPOTIONAL TO IT'S LENGTH.
and INVERSELY PROPOTIONAL TO THE CROSS SECTIONAL AREA.
R L/A, where R is the resistance, L is the length, and A is the cross sectional area.
The propotionality constant is called resistivity, and denoted by ρ.
R = ρL/A.
Answered by | 7th Aug, 2009, 10:04: PM
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