The charge center of athundercloud, drifting 3.0 km above the earth’s surface, contains 20 Cof negative charge. Assuming the charge center has a radius of 1.0 km,and modeling the charge center and the earth’s surface as parallel plates,calculate: the capacitance of the system

What is the capacitance of two square parallel plates 4.4 cm on a side that are separated by 1.4 mm of paraffin? Express your answer to two significant figures and include the appropriate units.

52% aill aO ODI 36 P 9:06 Find the capacitance ( in units of pF) of a metallic sphere that has a radius of 19.3 cm immersed (osgais) in a very large oil container with K=2.16). use ɛo = 8.8542x10-12 Fm-1. Metallic spbere Oil Select one: A. 11.60 B. 14.76 C. 27.08 D. 895.22 E. 46.38 O

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An air-filled parallel-plate capacitor has a capacitance of 2 pF. The plate separation is then halved and a wax dielectric is inserted, completely filling the space between the plates. As a result, the capacitance becomes 8 pF. The dielectric constant of the wax is:

A simple capacitor can be constructed from two conductive plates. Two conductive plates with an area of 10.0cm x 10.0 cm are held facing one another at a separation of 1.50 mm and 12.0 V is applied between them. a) Find the capacitance of this configuration b) Find the charge on the plates. c) How much energy is stored in the capacitor? d) How much energy can the capacitor store if a dielectric with K= 4.5 is inserted between the plates rather than air?

Consider a parallel plate capacitor having plates of area 1.4 cm2 that are separated by 0.018 mm of neoprene rubber. You may assume the rubber has a dielectric constant κ = 6.7. a) What is the capacitance in μF?  b) What charge, Q, in coulombs, does it hold when 9.00 V is applied to it?

Calculate the side length of a parallel plate capacitor with an air gap of 5.5 mm if its capacitance is measured to be 17.7 pF. Give your answer in SI units.

A slab of copper of thickness b = 1.68 mm is thrust into a parallel-plate capacitor of plate area A = 1.96 cm2 and plate separation d = 5.35 mm, as shown in the figure; the slab is exactly halfway between the plates. (a) What is the capacitance after the slab is introduced? (b) If a charge q = 2.68 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 inserted? (d) Is the slab sucked in or must it be pushed in? Copper (a) Number 4.73e-13 Units (b) Number i 0.686 (c) Number i 5.36e-10 Units J (d) sucked in

The dielectric of a parallel plate capacitor is to be constructed from glass (Kd= 4.6). The area of each plate is 0.50 m2 . A) What thickness should the glass have if the capacitance is to be 0.10 microfarad? B) What is the charge on the capacitor if connected to a 12-volt battery?