Physics, asked by Anonymous, 8 months ago

Resistance of a metal wire of length 1m is 26 ohm at 20⁰C.If the diameter of the wire is 0.3mm what will be the resistivity of the metal at that temperature?

Answers

Answered by Anonymous

6

Explanation:

, R=26ohm

d=0.3mm=3×10-⁴m

l=1m

p(rho)=RA/l

=R (pie )d²/4l

=26×22×3×10-⁴×3×10-⁴/7×4×1

=1.84×10-⁶ohm m

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