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Two nichrome wires have the same length, but wire A has twice the diameter of wire B. Compared to B, wire A has:

Question
Two nichrome wires have the same length, but wire A has twice the diameter of wire B. Compared to B, wire A has:
Four times the resistance
Half the resistance
One-fourth the resistance
The same resistance
Answer
One-fourth the resistance
Detailed Explanation
Doubling diameter quadruples the cross-sectional area (A µ d^2), and since R is inversely proportional to A, resistance becomes one-fourth.
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