Question

Resistance of a metal wire length 1m is 20 degree celcius. If the diameter of the wire is 0.4mm,what will be the resistivity of the metal at that temperature

Answer 1

Answer:

.0013624 if resistance =104ohm

Explanation:

Formula,

R=  ρl  /A

⇒ρ=  RA  / l

 =Rπd2  / 4l

 ρ=  104 ohm *3.14* .004^2 / 4*1

=.0013624

 

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