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Current Electricity: Resistance Formula MCQ

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Resistance FormulaEasyQuestion 31604

Question

Resistance of a uniform wire of resistivity ρ, length L, cross-section area A is:
  1. A
    ρA/L
  2. B
    ρL/A
    Correct
  3. C
    LA/ρ
  4. D
    ρ/(LA)

Correct answer

ρL/A

Explanation

R = ρL/A. Resistance increases with length and decreases with cross-sectional area.

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