An Air-Filled Capacitor Is Formed from Two Long Conducting Cylindrical

question 19

Multiple Choice

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 13 mm and 85 mm.The electric potential of the inner conductor with respect to the outer conductor is -600 V.(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²) The maximum energy density of the capacitor is closest to

• A) 2.7 × 10^-3 J/m³.
• B) 1.3 × 10^-3 J/m³.
• C) 6.7 × 10^-4 J/m³.
• D) 3.4 × 10^-3 J/m³.
• E) 1.7 × 10^-4 J/m³.

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