P26_076 - V 1 = 1 2 V 1 and 2 since they are identical...

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76. We do not employ energy conservation since, in reaching equilibrium, some energy is dissipated either as heat or radio waves. Charge is conserved; therefore, if Q =48 µ C, and q 1 and q 3 are the charges on C 1 and C 3 after the switch is thrown to the right (and equilibrium is reached), then Q = q 1 + q 3 . We note that V 1and2 = V 3 because of the parallel arrangement, and
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Unformatted text preview: V 1 = 1 2 V 1 and 2 since they are identical capacitors. This leads to 2 V 1 = V 3 2 q 1 C 1 = q 3 C 3 2 q 1 = q 3 where the last step follows from multiplying both sides by 2 . 00 µ F. Therefore, Q = q 1 + (2 q 1 ) which yields q 1 = 16 µ C and q 3 = 32 µ C....
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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