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Chapter 19: Q65PE (page 699)
Acapacitor is used in conjunction with a motor. How much energy is stored in it when 119 Vis applied?
The energy stored in the capacitor is 1.17 J.
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How does the energy contained in a charged capacitor change when a dielectric is inserted, assuming the capacitor is isolated and its charge is constant? Does this imply that work was done?
A doubly charged ion is accelerated to an energy of \(32.0{\rm{ }}keV\) by the electric field between two parallel conducting plates separated by \(2.00{\rm{ }}cm\). What is the electric field strength between the plates?
Find the maximum potential difference between two parallel conducting plates separated by \(0.500{\rm{ }}cm\) of air, given the maximum sustainable electric field strength in air to be \(3.0 \times {10^6}{\rm{ }}V/m\).
(a) A certain parallel plate capacitor has plates of area \(4.00\;{m^2}\), separated by \(0.01\;mm\) of nylon, and stores \(0.170\;C\) of charge. What is the applied voltage? (b) What is unreasonable about this result? (c) Which assumptions are responsible or inconsistent?
Suppose you want a capacitor bank with a total capacitance of 0.750Fand you possess numerous 1.50mFcapacitors. What is the smallest number you could hook together to achieve your goal, and how would you connect them?
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