Practice MCAT Question - Q35 - Answer!
If the length of a conducting wire is doubled, the resistance of the wire will be
A. quartered.
B. halved.
C. doubled.
D. quadrupled.
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The correct answer is (C). Resistance is directly proportional to length and inversely proportional to the cross-sectional area of the conductor. If the area remains constant, then doubling the length will double the resistance.
