A copper wire of length 2 m and area of cross-section 1.7 x 10-6 m2 has a resistance of 2 x 10-2 Ω. The resistivity of copper is
A. 1.7 x 10-8 Ωm
B. 1.9 x -8 Ωm
C. 2.1 x 10-7 Ωm
D. 2.3 x 10-7 Ωm
Answer:A
A copper wire of length 2 m and area of cross-section 1.7 x 10-6 m2 has a resistance of 2 x 10-2 Ω. The resistivity of copper is
A. 1.7 x 10-8 Ωm B. 1.9 x -8 Ωm C. 2.1 x 10-7 Ωm D. 2.3 x 10-7 Ωm