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resistance of a metal wire of length 1 m is 104 ohms at 20 degree celsius.if the diametre of the wire is 0.15mm. find the resistivity of the metal at this temp ?

resistance of a metal wire of length 1 m is 104 ohms at 20 degree celsius.if the diametre of the wire is 0.15mm. find the resistivity of the metal at this temp ?

Grade:12

1 Answers

Neeti
571 Points
6 years ago
resistance of a wire is given as
R= (\rho L)/A
where \rho is resistivity of the material, L it’s length and A it’s area. A of the wire is \pi x r2
Put the values in the formula and you’ll get the answer. If you like this answer please approve it and if you have any follow-up question feel free to ask :)

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