the resistance of a 1 m long nichrome wire is 6 ohm. if the diametre of wire is 0.4mm what will be the resistivity of wire?
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Explanation:
Resistance=2 ohm
Length=1m
Diameter=4 mm =4/1000=0.004m
Radius=diameter/2=0.004/2=0.002m
Resistance = resistivity×length/area
2 = resistivity×1/0.002
2×2/1000=resistivity
4/1000=resistivity
0.004= resistivity
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