Q. Find the resistance (in mega Ω) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200 Ωm.
A) 4000
B) 40
C) 2000
D) 80
✔ Correct Answer: 40
Exam Insight
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A) 4000
B) 40
C) 2000
D) 80
✔ Correct Answer: 40
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