Very Large Capacitors Have Been Considered as a Means for Storing

question 65

Multiple Choice

Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 10 m² using paper ( $\kappa$ = 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate voltage of 5000 V? ( $\varepsilon$ ₀ = 8.85 *10 ^{- 12} C²/N.m²)

• A) 4.1 J
• B) 8200 J
• C) 0.41 J
• D) 82,000 J

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