Question

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?

Answer 1

Answer:

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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