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A parallel plate capacitor in air has a plate separation of 1.5 cm and a plate area of 25 cm^2. The plates are charged to a potential difference of 250V and disconnected from the source. The capacitor is then immersed in distilled water.

(a) Determine the charge on the plate after immersion.

(b) Capacitance and potential difference after immersion and

(c) The change in the energy of the capacitor.

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