Question

Resistance of a metal wire of length 1m is 26 ꭥ at 20oC. If the diameter of the wire is 0.3mm, what will be the resistivity of the metal at that temperature? Predict the material of the wire.(urgent plzz)

Answer 1

Answer:

given,

R = 26Ω

diameter = 0.3 mm

radius = 0.15 mm = 0.15 * 10⁻³ m = 1.5 * 10⁻⁴ m

length = 1 m

R = ρl/A

ρ = R*A/l

  = 26 * 3.14 * 1.5*1.5*10⁻⁸ /1

  = 183.69 * 10⁻⁸

  = 1.836* 10⁻⁶

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Answer 2

REFER THE ATTACHMENT »

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