Question

6 Calculate the resistance of a copper wire of length 1m and area of cross section 2mm².resistivity of copper is 1.7×10-8ohm m.
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Answer 1

Answer:R = 0.0085 ohms = 8.5 milli ohms

Step-by-step explanation:

we know, that the resistance is given as

R = ρL / A

here,

ρ = 1.7 x 10-8 Ω m

L = 1 m

A = 2 mm2 = 2 x10-6 m2

so,

R = ( 1.7 x 10-8 X 1 )/ 2 x10-6

thus, we have

R = 0.0085 ohms = 8.5 milli ohms