A professor designing a class demonstration connects a parallel-plate capacitor to a battery, so that the potential difference between the plates is 275 V. Assume a plate separation of d = 1.33 cm and a plate area of A = 25.0 cm?. When the battery is removed, the capacitor is plunged into a container of distilled water. Assume distilled water is an insulator with a dielectric constant of 80.0. (a) Calculate the charge on the plates (in pC) before and after the capacitor is submerged. (Enter the magnitudes.) before Q, = v pC 457.47 after 457.47 V pC (b) Determine the capacitance (in F) and potential difference (in V) after immersion. C, = 1.33083e- v F AV, = 3.43 (e) Determine the change in energy (in nJ) of the capacitor. AU = (6.303e-8 × Write expressions for the initial and final energies, and take the difference. nJ
A professor designing a class demonstration connects a parallel-plate capacitor to a battery, so that the potential difference between the plates is 275 V. Assume a plate separation of d = 1.33 cm and a plate area of A = 25.0 cm?. When the battery is removed, the capacitor is plunged into a container of distilled water. Assume distilled water is an insulator with a dielectric constant of 80.0. (a) Calculate the charge on the plates (in pC) before and after the capacitor is submerged. (Enter the magnitudes.) before Q, = v pC 457.47 after 457.47 V pC (b) Determine the capacitance (in F) and potential difference (in V) after immersion. C, = 1.33083e- v F AV, = 3.43 (e) Determine the change in energy (in nJ) of the capacitor. AU = (6.303e-8 × Write expressions for the initial and final energies, and take the difference. nJ
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