Solve. -At a Fixed Temperature, the Resistance R of a Wire

question 154

Multiple Choice

Solve.
-At a fixed temperature, the resistance R of a wire varies directly as the length l and inversely as the square of its diameter d. If the resistance is 0.84 ohm when the diameter is 1 mm and the length is 210 cm, what is the
Resistance when the diameter is 2 mm and the length is 530 cm?

• A) 0.53 ohm
• B) 111.3 ohm
• C) 1.06 ohm
• D) 132.5 ohm

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