discussion+problems+feb+1

# discussion+problems+feb+1 - charge on each plate(c What is...

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24.14 A spherical capacitor is formed from two concentric, spherical, conducting shells separated by a vacuum. The inner sphere has radius 15.0 cm and capacitance is 116 pF . (a) What is the radius of the outer sphere? (b) If the potential difference between the two spheres is 220 V , what is the magnitude of charge on each sphere?

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24.22 The figure to the right shows a system of four capacitors, where the potential difference across ab is 50.0 V . (a) Find the equivalent capacitance of this system between a and b . (b) How much charge is stored by this combination of capacitors? (c) How much charge is stored in each of the 10.0 - μF and the 9.0 - μF capacitors?
24.48 A parallel-plate air capacitor is made by using two plates 16 cm square, spaced 4.7 mm apart. It is connected to a 12 V battery. (a) What is the capacitance? (b) What is the

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Unformatted text preview: charge on each plate? (c) What is the electric field between the plates? (d) What is the energy stored in the capacitor? (e) If the battery is disconnected and then the plates are pulled apart to a separation of 9.4 mm , what are the answers to parts (a)-(d)? • 24.62 Capacitance of a Thundercloud. The charge center of a thundercloud, drifting • 3.0 km above the earth’s surface, contains 20 C of 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: (a) the capacitance of the system; (b) the potential difference between charge center and ground; (c) the average strength of the electric field between cloud and ground; (d) the electrical energy stored in the system....
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## This note was uploaded on 02/15/2012 for the course PHYS 240 taught by Professor Winn during the Winter '11 term at University of Michigan.

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discussion+problems+feb+1 - charge on each plate(c What is...

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