An isolated large-plate capacitor (not connected to anything) originally has a p

Question

An isolated large-plate capacitor (not connected to anything) originally has a potential difference of 870 volts with an air gap of 2 mm. Then a plastic slab 1 mm thick, with dielectric constant 5.5, is inserted into the middle of the air gap as shown in the figure. As shown in the diagram, location 1 is at the left plate of the capacitor, location 2 is at the left edge of the plastic slab, location 3 is at the right edge of the slab, and location 4 is at the right plate of the capacitor. All of these locations are near the center of the capacitor. Calculate the following potential differences. V1 - V2 = ____ V V2 - V3 = ____ V V3 - V4 = _____ V V1 - V4 = ______ V

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plz upload the figure

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