A Metal Cylinder of Radius 2

question 44

Multiple Choice

A metal cylinder of radius 2.0 mm is concentric with another metal cylinder of radius 5.0 mm. If the space between the cylinders is filled with air and the length of the cylinders is 50 cm, what is the capacitance of this arrangement? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

• A) 33 pF
• B) 60 pF
• C) 22 pF
• D) 30 pF
• E) 11 pF

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