For the provided circuit, C 1 = C 2 = 114 pF, C 3 = 57 pF, and C 4 = 152 pF a) W
ID: 1311316 • Letter: F
Question
For the provided circuit, C1 = C2 = 114 pF, C3 = 57 pF, and C4 = 152 pF
a) What is, in pF, the equivalent capacitance C23 to C2 and C3? 38 pF
b) What is, in pF, the equivalent capacitance C123 to C1, C2 and C3? 152 pF
c) What is, in pF, the equivalent capacitance Ceq to C1, C2, C3 and C4? 76pF
d) What is, in pC, the amount of charge stored in the capacitors of the circuit? 912 pC
e) What is, in pC, the amount of charge stored in capacitor C4?
I could figure out all the other parts to this problem except for e, please help!
Explanation / Answer
to get the charge on the capacitorC4 fist we calculate the voltahe across thatcapacitor
first we find the equivalent capacitance ofC2 and C3 which is C5say
C5 = (C2) (C3) /(C2 + C3)
= ........pF
after that C5 is in parllel withC1 then the equvalent capacitance will be
Ceq = C1 +C5
=........ pF
so the voltage across C4 willbe
V4 = (12 V) (Ceq) /(Ceq + C4)
= ........V
so the charge on C4 will be
Q4 = C4 V4
= .........pC