Two Square Air-Filled Parallel Plates That Are Initially Uncharged Are

question 19

Multiple Choice

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? (ε₀₀ = 8.85 × 10^-12 C²/N ∙ m²)

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

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