A Cylindrical Capacitor Is Made of Two Concentric Cylinders

question 63

Multiple Choice

A cylindrical capacitor is made of two concentric cylinders. The inner cylinder has radius r₁ = 4 mm, and the outer one a radius r₂ = 8 mm. The common length of the cylinders is L = 150 m. What is the potential energy stored in this capacitor when a potential difference V = 4 V is applied between the inner and outer cylinder?

• A)9.6 × 10^-8 J
• B)1.3 × 10^-8 J
• C)6.3 × 10^-8 J
• D)0.34 × 10^-8 J
• E)4.6 × 10^-8 J

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