With vacuum between its plates, a parallel-plate capacitor has capacitance 5.60 mF. You attach a power supply to the capacitor, charging it to 1.50 kV. Keeping the power supply connected, you insert a dielectric sheet with dielectric constant 2.85 that fills the space between the plates. Find the energy stored in the capacitor (a) before the sheet is inserted and (b) after the sheet is inserted.

With vacuum between its plates, a parallel-plate capacitor has capacitance 5.60 mF. You attach a power supply to the capacitor, charging it to 1.50 kV. Keeping the power supply connected, you insert a dielectric sheet with dielectric constant 2.85 that fills the space between the plates. Find the energy stored in the capacitor (a) before the sheet is inserted and (b) after the sheet is inserted.

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Question

With vacuum between its plates, a parallel-plate capacitor
has capacitance 5.60 mF. You attach a power supply to the capacitor,
charging it to 1.50 kV. Keeping the power supply connected, you insert
a dielectric sheet with dielectric constant 2.85 that fills the space between
the plates. Find the energy stored in the capacitor (a) before the
sheet is inserted and (b) after the sheet is inserted.

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