35. A parallel-plate capacitor is constructed of two horizontal 12.0-cm-diameter circular plates. A 0.50 g plastic bead, with a charge of -6.0 nC, is suspended between the two plates by the force of the electric field between them. a. Which plate, the upper or the lower, is positively charged? b. What is the charge on the positive plate?
35. A parallel-plate capacitor is constructed of two horizontal 12.0-cm-diameter circular plates. A 0.50 g plastic bead, with a charge of -6.0 nC, is suspended between the two plates by the force of the electric field between them. a. Which plate, the upper or the lower, is positively charged? b. What is the charge on the positive plate?
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35
Transcribed Image Text:Bouc
34. Two identical closely spaced circular disks form a parallel-
plate capacitor. Transferring 1.5 X 109 electrons from one disk
to the other causes the electric field strength between them to
be 1.0 X 105 N/C. What are the diameters of the disks?
Section 20.6 Conductors and Electric Fields
35. A parallel-plate capacitor is constructed of two horizontal
12.0-cm-diameter circular plates. A 0.50 g plastic bead, with a
charge of -6.0 nC, is suspended between the two plates by the
force of the electric field between them.
a. Which plate, the upper or the lower, is positively charged?
b. What is the charge on the positive plate?
36. | Students in an introductory physics lab are performing an
experiment with a parallel-plate capacitor made of two circular
aluminum plates, each 20 cm in diameter, separated by 1.0 cm.
How much charge can be added to each of the plates before a
spark jumps between the two plates? For such flat electrodes,
the fie
is at the high
of the range pre-
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