A Certain Metal Has a Resistivity Of $1.68 \times 10 ^ { - 8 } \Omega \cdot \mathrm { m }$

question 51

Multiple Choice

A certain metal has a resistivity of $1.68 \times 10 ^ { - 8 } \Omega \cdot \mathrm { m }$ . You have a long spool of wire made from this metal. If this wire has a diameter of $0.15 \mathrm {~mm}$ , how long should you cut a segment so its resistance will be $15 \Omega$ ?

• A) \(16 \mathrm {~m}\)
• B) \(1.6 \mathrm {~m}\)
• C) \(16 \mathrm {~mm}\)
• D) \(16 \mathrm {~cm}\)

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