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A Certain Metal Wire Has a Cross-Sectional Area Of 1.0 cm21.0 \mathrm {~cm} ^ { 2 }

Question 42

Multiple Choice

A certain metal wire has a cross-sectional area of 1.0 cm21.0 \mathrm {~cm} ^ { 2 } and a resistivity of 1.7×108Ωm1.7 \times 10 ^ { - 8 } \Omega \cdot \mathrm { m } . How long would it have to be to have a resistance of 1.0Ω1.0 \Omega ?


A) 5.9×104 m5.9 \times 10 ^ { 4 } \mathrm {~m}
B) 5.9 m5.9 \mathrm {~m}
C) 5.9×106 m5.9 \times 10 ^ { 6 } \mathrm {~m}
D) 5.9 km5.9 \mathrm {~km}
E) 590 m590 \mathrm {~m}

Correct Answer:

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