A capacitor A1B1 of capacitance C1=2microF is charged under a voltage U1=20V and then isolated.
a) Calculate the voltage U (A1B1) between its plates, and it's charge Q1 and energy W1.
b) The plates A1 and B1 are connected to those A2 and B2 of an uncharged capacitor of capacitance C2=8microF. At electric equilibrium the respective charges of the capacitor becomes Q'1 and Q'2. Establish a relation between Q1, Q'1 and Q'2.
Compare the final energy of the system to the initial energy of the capacitor (A1B1).
P.S:I only need part b.
Thank you
3 answers
Use the work-energy theorem to solve each of these problems. You can use Newton's laws to check your answers. Neglect air resistance in all cases.
I think you're mistaken
Since the second capacitor is 4x as big it will hold charge in a 4:1 ratio.
0 answers