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Chapter 19: Q8CQ (page 694)
Will a negative charge, initially at rest, move toward higher or lower potential? Explain why.
The negative charge will go towards the higher potential.
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(a) What is the capacitance of a parallel plate capacitor having plates of area 1.50 m2 that are separated by 0.0200 mmof neoprene rubber? (b) What charge does it hold when 9.00 Vis applied to it?
Integrated Concepts
A \(12.0\;V\)battery-operated bottle warmer heats \(50.0\;g\)of glass, \(2.50 \times {10^2}{\rm{ }}g\)of baby formula, and \(2.00 \times {10^2}\;g\)of aluminium from \({20.0^\circ }C\) to \({90.0^\circ }C\).
(a) How much charge is moved by the battery?
(b) How many electrons per second flow if it takes \(5.00\)min to warm the formula? (Hint: Assume that the specific heat of baby formula is about the same as the specific heat of water.)
Integrated Concepts
Singly charged gas ions are accelerated from rest through a voltage of \(13.0{\rm{ }}V\). At what temperature will the average kinetic energy of gas molecules be the same as that given these ions?
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 total capacitance of the combination of capacitors shown in Figure 19.34 .
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