Question

what will be the resistance of a metal wire of length 3nmetre and area of cross section
$1.55 \times {10}^{ - 6}$
m², if the resistivity of the wire
$2.8 \times {10}^{ - 8}$
ohk meter.


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Answer 1

deepest to the attached file for the answer.

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$hope \: this \: helps \: you$
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Answer 2

heya...

Here is your answer...

l=2 m, A=1.55 * 10-6 m2, p=2.8* 10-5

R= p*l/A,

=>  R = (2.8*10-5) * (2)  /  1.55* 10-6

=> R= 2.8*2*10 / 1.55

=> R = 28*2 / 1.55 

  =  56 / 1.55

=> R  =  36.1

It may help you...☺☺