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How is electrical resistance related to the length and area of cross-section of an object?

Options

  1. AR is inversely proportional to length (l) and directly proportional to area ( A).
  2. BR is directly proportional to length (l) and inversely proportional to area ( A).
  3. CR is directly proportional to both length (l) and area ( A).
  4. DR is inversely proportional to both length (l) and area ( A).

Correct answer

B. R is directly proportional to length (l) and inversely proportional to area ( A).

Step-by-step solution

Electrical resistance (R) is directly proportional to length (l) and inversely proportional to the area of cross-section (

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