1 answer

In the configuration below, the battery is 50 V. Find the charge and energy stored on...

Question:

In the configuration below, the battery is 50 V. Find the charge and energy stored on capacitor C2. 6. C3 C2

In the configuration below, the battery is 50 V. Find the charge and energy stored on capacitor C2. 6. C3 C2

Answers

C2 and C3 are in parallel


C23 = C2 + C3

C23 = 7 uF


C23 and C1 are in series

1/Ceq = 1/C23 + 1/C1

1/Ceq = 1/7 + 1/2


Ceq = 1.56 uF


charge on C1 , Q1 = Ceq*V = 1.56*50 uC = 78 uC


potential across C2 , v2 = Q1/C23


charge on Capacitor C2 , Q2 = C2*V2 = C2*Q1/C23 = 3*78/7 uC = 33.4 uC


=========================


energy stored = (1/2)*Q2^2/C2 = (1/2)*(33.4*10^-6)^2/(3*10^-6) = 1.86*10^-4 J

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