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17.62) A pair of parallel plates are separted by 1.5 mm of air. An electric field of 3.0 x 10 (negative 4) V/m exists between the plates. What is the potential difference between the plates?

Capacitance of a parallel plate capacitor with dielectric.

17.68) A capacitor is made from two parallel conducting plates, each with an area of 860 squared. The plates are separated by a dielectric film 0.250 mm thick. Measurements show that the potential difference between the plates is 185 V when the charge on the plates is 1.75 uC. (a) What is the capacitance of the capacitor? (b) What is the most likely material used for the dielectric?

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17.72) A 100- uF parallel- plate capacitor is charged to 500 V. It is then disconnected from the charging source and insulated. (a) How much energy is stored on the capacitor? (b) If the plates are pulled apart to a seperation that is twice their initial aeparation, what energy is tored on the capacitor> (c) If the answers are not identical, account for their difference.

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17.66) An isolated metal sphere of radius R( one) carries an electrical charge Q. A second sphere of radius R (second) and initially uncharged is brought into contact with the first sphere. Charge is exchanged between the two and they are separated. How much charge remains on the first sphere?

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17.62) A pair of parallel plates is separated by 1.0mm of air. If the plates are changed to a potential difference of 75 V, what is the electric field between the plates?