*20 Figure 25-35 shows avariable "air gap" capacitor formanual tuning. Alternate platesare connected together; onegroup of plates is fixed in posi-tion, and the other group iscapable of rotation. Consider acapacitor of n = 8 plates of al-ternating polarity, each platehaving area A = 1.25 cm? andseparated from adjacent plates by distance d = 3.40 mm. What is themaximum capacitance of the device?Figure 25-35 Problem 20.

Answered: Image /qna-images/answer/bba6efea-04f0-4e44-a20d-f530930c7276.jpg

Answered: *20 Figure 25-35 shows a variable "air…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter8: Capacitance

Section: Chapter Questions

Problem 84CP: A capacitor has parallel plates of area 12 cm2 separated by 2.0 mm. The space between the plates is...

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A spherical capacitor contains a charge of 3.30 nC when connected to a potential difference o 220 V. Its plates are separated by vacuum and the inner radius of the outer shell is 4.00cm. Determine the capacitance.
Bevw I Conarta In this problem you must first caloulate the potential V at z +L dus to the charged rod. You can then fnd the change in potential energy involved in bringing the point change trom infinity (where V-0) to +L. Positive olectric charge Qis distributed uniformly along a thin rod of length 2a. The rod lies along the z-axis between a -a and a ta Eigure 1). Calculate how much work you must do to bring a positive point chargeg from infinity to the point a+L on the a-axis, where L>a Part A To find V. divide the rod into infinitesimal segments of length de Consider one such segment located at zz. where -asz Sa. What is the potential dV at z+L due to this segment? Express your answer in terms of some or all of the variables Q. a. L, da, . electric constant e, and r, Figure 1 oft > View Available Hint(a) show is side. 78.06707 dV- at wha0 b finliity Submit Previous Anawers round X Incorrect; Try Again; 3 attempts remaining douapadia

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