Question

Determine the resistance of an aluminium wire, which is 400 m long and 2 μm. Assume the sheet resistance for aluminium is 0.075 2.​

Answer 1

Answer:

d=10km=10×103 meter

d=2.0mm⇒ radius r = 1 mm = 1×10−3 meter.

⇒ cross sectional area A=πr2=π×10−6m2

So resistance R=APl=2.7×10−8×π×10−6104Ω

⇒R=85.98Ω