The Resistance of A $100 - \mathrm { cm }$ Wire of Cross Sectional Area

question 91

Multiple Choice

The resistance of a $100 - \mathrm { cm }$ wire of cross sectional area $2 \times 10 ^ { - 6 } \mathrm {~m} ^ { 2 }$ is $400 \Omega$ . What is the resistivity of the material from which this wire is made?

• A) \(0.80 \times 10 ^ { - 5 } \Omega \cdot \mathrm { m }\)
• B) \(0.80 \times 10 ^ { - 6 } \Omega \cdot \mathrm { m }\)
• C) \(8.0 \times 10 ^ { - 4 } \Omega \cdot \mathrm { m }\)
• D) \(8.0 \times 10 ^ { - 6 } \Omega \mathrm { V }\)
• E) \(0.80 \times 10 ^ { - 4 } \Omega \cdot \mathrm { m }\)

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