Capacitors of C1 = 1 micro-farads, C2 = 5 micro-farads, and C3 = 3 micro-farads

Question

Capacitors of C1 = 1 micro-farads, C2 = 5 micro-farads, and C3 = 3 micro-farads are connected purely in parallel to a 9 volt battery. What is the stored energy in C2 in micro-joules?

Capacitors of C1 = 10 micro-farads, C2 = 9 micro-farads, and C3 = 5 micro-farads are connected purely in series to a 7 volt battery. What is the stored energy in C2 in micro-joules?

Capacitors of C1 = 1 micro-farads, C2 = 5 micro-farads, and C3 = 3 micro-farads are connected purely in parallel to a 9 volt battery. What is the stored energy in C2 in micro-joules? Capacitors of C1 = 10 micro-farads, C2 = 9 micro-farads, and C3 = 5 micro-farads are connected purely in series to a 7 volt battery. What is the stored energy in C2 in micro-joules? A 4 kilo-ohm resistor and a 4 micro-farad capacitor are connected in series to a 24 volt battery. After 15 milli-seconds, the battery is disconnected. What is the voltage across the resistor, 3 milli-seconds after the battery has been disconnected in volts?

Explanation / Answer

1] enery stored in capacitor = 0.5*CV^2

= 0.5*5*9^2

= 202.5 uJ answer

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