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An air-insulated parallel-plate capacitor of capacitance C0 is chained to voltage V0 and then disconnected from the charging battery. A slab with dielectric constant κ and thickness equal to the capacitor spacing is then inserted halfway into the capacitor (Fig. 23.16). Determine (a) the new capacitance, (b) the stored energy, and (c) the force on the slab in terms of C0, V0, κ, and the plate length L.
FIGURE 23.16 Problems 64 and65
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