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hrome File Edit View History Bookmarks People Window Help Mastering Physios: pp19,5 stering physics.com/myct/itemview?assignmentProblemID 73591026 Secure hy 284 Sp17 Problem 18.45 e previous l 2 of 2 l not Problem 18.45 Part A In the croul shown in Egune the potonial diference Calculate the charge on the 3.00 AaF capacitor. across ab is 25.5V. Express your answer in microcoulombs to three significant figures. of 1 Submit My Answers give up 300 pF Part B Calculate the charge on the 500 RF capacitor Express your answer in microcoulombs to three significant figures. 5.00 RF 600 HFExplanation / Answer
a )
3uF and 5uF are in parallel each other
the equaivalent capacitor is = 3 + 5 = 8 uF
this 8 uF is in series with 6 uF
1 / C = 1 / 8 + 1 / 8
C = 3.43 uF
the potential difference is 6 uF = 8 X 25.5 / ( 8 + 6 )
= 14.57 V
the charge on 3 uF capacitor is = 25.5 X 6 / ( 6 + 8 )
= 10.92 volts
Q = C X V
Q = 3 X 10-6 X 10.92
Q = 32.76 X 10-6
Q = 32.76 uC
b )
the charge on 5 uF capacitor is = 25.5 X 6 / ( 6 + 8 )
= 10.92 volts
Q = C X V
Q = 5 X 10-6 X 10.92
Q = 54.6 X 10-6
Q = 54.6 uC
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