A $120 - \mathrm { m }$ Long Metal Wire Having a Resistivity Of

A $120 - \mathrm { m }$ long metal wire having a resistivity of $1.68 \times 10 ^ { - 8 } \Omega \cdot \mathrm { m }$ has a resistance of $6.0 \Omega$ . What is the diameter of the wire?

A) $0.65 \mathrm {~cm}$
B) $0.65 \mathrm {~m}$
C) $0.065 \mathrm {~mm}$
D) $0.65 \mathrm {~mm}$

Correct Answer:

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