1.

A wire with length and cross sectional area A has resistance of 20 ohms. What is the resistance if the cross sectional area of the wire is doubled

Answer»

heya mateThe RESISTANCE of a CONDUCTOR is directly proportional to its length (L) as R ∝ L. THUS doubling its length will DOUBLE its resistance, while halving its length would halve its resistance. ALSO the resistance of a conductor is inversely proportional to its cross-sectional area (A) as R ∝ 1/A.plz mαrk αѕ вrαnlíѕt



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