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    • Question

      The resistance of a wire is directly proportional

      to:
      A Square of its length Correct Answer Incorrect Answer
      B Its length and inversely proportional to area Correct Answer Incorrect Answer
      C Its area Correct Answer Incorrect Answer
      D Its temperature only Correct Answer Incorrect Answer

      Solution

      According to the formula: R = ρ(L/A) where R is resistance, L is length, A is cross-sectional area, and ρ is resistivity. So, resistance increases with length and decreases with area.

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