Two Cylindrical Resistors Are Made of the Same Material and Have

question 98

Multiple Choice

Two cylindrical resistors are made of the same material and have the same resistance. The resistors, R₁ and R₂, have different radii, r₁ and r₂, and different lengths, L₁ and L₂. Which of the following relative values for radii and lengths would result in equal resistances?

• A) r₁ = r₂ and 4L₁ = L₂
• B) r₁ = r₂ and L₁ = 2L₂
• C) 2r₁ = r₂ and 4L₁ = L₂
• D) 2r₁ = r₂ and L₁ = 2L₂

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