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When a 360-nF air capacitor (1 nF = 10−9F) is connected to a power supply, the energy stored in the capacitor is l.85 × 10−5 J. While the capacitor is kept connected to the power supply, a slab of dielectric is inserted that completely fills the space between the plates. This increases the stored energy by 2.32 × 10−5 J. (a) What is the potential difference between the capacitor plates? (b) What is the dielectric constant of the slab?
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