UN Fisika 2016 Paket 3 Nomor 36

Perhatikan rangkaian kapasitor berikut!

36

Bila {{C}_{1}}=4~\mu F,~{{C}_{2}}={{C}_{3}}=3~\mu F,~{{C}_{4}}=5~\mu F,~{{C}_{5}}=4~\mu F, muatan pada kapasitor {{C}_{4}} adalah …

A.    12 \mu F D.    72 \mu F
B.     16 \mu F E.     240 \mu F
C.     40 \mu F

Penyelesaian

Kapasitor pengganti rangkaian parallel

{{C}_{P}}=4+3+3=10~\mu F

 

Kapasitor pengganti rangkaian seri

\frac{1}{{{C}_{S}}}=\frac{1}{10}+\frac{1}{5}+\frac{1}{4}=\frac{11}{20}

{{C}_{S}}=\frac{20}{11}~\mu F

 

Total muatan yang tersimpan dalam rangkaian

Q={{C}_{s}}V=\frac{20}{11}~\mu F~.~22=40~\mu C

jawaban C

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