The resistance of a metallic wire is
A. directly proportional to its length and inversely proportional to its area of cross-section
B. inversely proportional to the product of its area of cross-section and length
C. inversely proportional to its length and directly proportional to its area of cross-section
D. directly proportional to the product of its area of cross-section and length
Answer: Option A
Related Questions on Electricity and Magnetism
What will be the total resistance of the three 20-Ω coils connected in series?
A. 40 Ω
B. 20 Ω
C. 60 Ω
D. 800 Ω
Superconductors are substances which
A. conduct electricity at lower temperature
B. offer high resistance to the flow of current
C. offer not resistance to the flow of current
D. conduct electricity at high temperature

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