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the answerse are A and B, respectively. show me calculations. Thanks A 3.0- mu F

ID: 3896373 • Letter: T

Question

the answerse are A and B, respectively. show me calculations. Thanks

A 3.0- mu F capacitor charged to 40 V and a 5.0- mu F capacitor charged to 18 V are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 3.0- mu F capacitor? A 6.0- mu F capacitor charged to 50 V and a 4.0- mu F capacitor charged to 34 V are connected to each other, with the two positive plates connected and the two negative plates connected. What is the total energy stored in the 6.0- mu F capacitor at equilibrium?

Explanation / Answer

CV =Q

3*40-5*18 = 30 uC

charge on 3uF

= 30*3/8

= 11 uC

b)

(6*50+4*34)*6/10

q = 261.6 uC

E = 0.5*q^2/C

= 0.5*261.6^2/6

= 5702.88 uJ

= 5.7 mJ