70 A slab of copper of thickness b = 2.00 mm is thrust into a parallel- plate capacitor of plate area A = 2.40 cm? and plate separation d = 5.00 f mm, as shown in Fig. 25-57; the slab is exactly halfway between the plates. (a) What is the capacitance after the slab is introduced? (b) If a charge q = 3.40 µC is maintained on the plates, what is the ratio of the stored energy before to that after the slab is inserted? (c) How much work is done on the slab as it is in- serted? (d) Is the slab sucked in or must it be pushed in? Figure 25-57 Problems 70 and 71.

70 A slab of copper of thickness b = 2.00 mm is thrust into a parallel- plate capacitor of plate area A = 2.40 cm? and plate separation d = 5.00 f mm, as shown in Fig. 25-57; the slab is exactly halfway between the plates. (a) What is the capacitance after the slab is introduced? (b) If a charge q = 3.40 µC is maintained on the plates, what is the ratio of the stored energy before to that after the slab is inserted? (c) How much work is done on the slab as it is in- serted? (d) Is the slab sucked in or must it be pushed in? Figure 25-57 Problems 70 and 71.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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