What happens to the value of resistance of a wire if the area of cross section of wire is doubled? (2 marks) Class 10 CBSE Physics chapter 12 Pls Read the question carefully and please write the correct answer. Spam answer will be reported.... M
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Answer:The value of resistance is half.
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The resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area. As the wire is stretched to its double length, its cross-sectional area will become half, hence, the resistance of the stretched wire will become 4 times.
R ∝ 1/A
RA ∝ K (k is constant)
R1 A1 = R2 A2
R1 / R2 = A2 / A1
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