Resistance of a metal wire of length 1m is 26ohm at 20 degree. if the diameter of the wire is 0.3 m what will be the resistivity of the metal at the temperature?
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Given: l = 1 m
d = 0.3 mm
A = r2 = 3.14 x 2.25 x 10-8 = 7.065 x 10-8m2
Formula: = R x A / l
= 26 x 7.065 x 10-8
=183.69 x 10-8m
Thus, the resistivity of the metal wire at 20C is 183.69 x 10-8m.
d = 0.3 mm
A = r2 = 3.14 x 2.25 x 10-8 = 7.065 x 10-8m2
Formula: = R x A / l
= 26 x 7.065 x 10-8
=183.69 x 10-8m
Thus, the resistivity of the metal wire at 20C is 183.69 x 10-8m.
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