ch25_p28 - 28. (a) The potential difference across C1 (the...

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28. (a) The potential difference across C 1 (the same as across C 2 ) is given by () ( ) 3 12 123 15.0 F 100V 50.0V. 10.0 F+5.00 F+15.0 F CV VV CCC µ µµµ == = = ++ Also, V 3 = V – V 1 = V – V 2 = 100 V – 50.0 V = 50.0 V. Thus, ( ) ( ) 4 11 1 4 22 2 44 4 312 10.0 F 50.0V 5.00 10 C 5.00 F 50.0V 2.50 10 C 5.00 10 C 2.50 10 C=7.50 10 C. qC V V qqq −− = × =+= × + × × (b) The potential difference V 3 was found in the course of solving for the charges in part (a). Its value is V 3 = 50.0 V. (c) The energy stored in C 3 is ( ) 2 33 3
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This note was uploaded on 01/25/2011 for the course PHYSICS 17029 taught by Professor Rebello,nobels during the Spring '10 term at Kansas State University.

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