Two Cylindrical Resistors Are Made of the Same Material and Have

question 22

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

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