The aluminum wire has a radius of 0.25 mm and a length of 75 meters. If the resistance of the wire is 10 ohms
Find the resistivity of aluminum.
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4
Answer: HEY MATE
HERE IS YOUR ANSWER
Explanation:
Resistivity = (R x A)/length
Radius = 0.25mm = 0.00025 m
length = 75m
Resistance = 10 ohms
Area of cross section = πr^2
= 22/7 x 0.00025 x 0.00025
Resistivity =
(10 x 22/7 x 0.00025 x 0.00025 ) ÷ 75
= (220/7 x 0.00025 x 0.00025)/75
= 2.63 x 10 to the power (-8) ohmmeter
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Answered by
0
Answer:
R= pl /A =pl / πr²
p = Rπr² / = 10×3.14×(0.25×10⁻³)² /75
2.6×10⁻⁸Ω
Explanation:
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