Question

calculate the radius of cross-section wire if its length is 27m,its resistance is 54ohm and resistivity of wire is 25.12x10^-2 ohm meter​

Answer 1

SOLUTION

We know: R=ρlA

where, R is the resistance

        ρ is the resistivity

         l is the length  

         and A is the area.

⇒A=ρlR=1.84×10−6128=6.57×10−8m2

Answer 2

Answer:

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Explanation:

length=27cm

Find radius.

radius= Suppose,(r)

r = length ÷ 2

r = 27 ÷ 2

r = 13.5

r = 13.5cm

Therefore radius = 13.5cm