Round to the Nearest Tenth Unless Indicated Otherwise $0.1$ Inch Has a Resistance of 3 Ohms What Would the of a Wire

question 223

Multiple Choice

Round to the nearest tenth unless indicated otherwise.
-The resistance of a wire varies directly as the length of the wire and inversely as the square of the diameter of the wire. A 20 foot length of wire with a diameter of $0.1$ inch has a resistance of 3 ohms What would the resistance be for a 21 foot length, with diameter $0.01$ inch, of the same kind of wire ?

• A) \(308 \mathrm { ohms }\)
• B) \(327 \mathrm { ohms }\)
• C) \(312.5 \mathrm { ohms }\)
• D) \(315 \mathrm { ohms }\)

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