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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

Find the charge on each of the capacitors in Figure P16.43.

images

Figure P16.43

To determine
The charge on each capacitor.

Explanation

The capacitors 1.00μF and 5.00μF are connected in series combination. The equivalent capacitance is,

Cpt=C1.00μFC5.00μFC1.00μF+C5.00μF

The capacitors 8.00μF and 4.00μF are connected in series combination. The equivalent capacitance is,

Cpb=C8.00μFC4.00μFC8.00μF+C4.00μF

The capacitances Cpt and Cpb are in parallel combination. The total equivalent capacitance is,

Ceq=Cpt+Cpb

Therefore,

Ceq=(C1.00μFC5.00μFC1.00μF+C5.00μF)+(C8.00μFC4.00μFC8.00μF+C4.00μF)

Substitute 1.00μF for C1.00μF , 5.00μF for C5.00μF , 8.00μF for C8.00μF and 4.00μF for C4.00μF

Ceq=[(1.00μF)(5.00μF)(1.00μF)+(5.00μF)]+[(8.00μF)(4.00μF)(8.00μF)+(4.00μF)]=4.00μF

Formula to calculate the total charge is,

Qtotal=CeqV

Substitute 4.00μF for Ceq and 24.0 V for V.

Qtotal=(4.00μF)(24.0V)=96.0μC

Formula to calculate the charge on 1.00μF capacitor is,

Q1=C1.00μF(QtotalC1.00μF+C5.00μF)

Substitute 96.0μC for Qtotal , 1.00μF for C1.00μF and 5.00μF for C5.00μF

Q1=(1

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