Energy in Capacitors: Two Square Air-Filled Parallel Plates That Are

question 26

Multiple Choice

Energy in capacitors: Two square air-filled parallel plates that are initially uncharged are separated by 1.2 mm, and each of them has an area of 190 mm². How much charge must be transferred from one plate to the other if 1.1 nJ of energy are to be stored in the plates? (ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A) 56 pC
• B) 39 pC
• C) 78 pC
• D) 3.5 µC

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