nksunmoon
Junior Member level 2
I have a question about the conservation of charge. the picture of the circuit is in the file uploaded.i know that the total charge of the c1 and c2 is changed after the v1 changed to v2. So the following eqution is right:Vd2-Vd1=C1(V2-V1)/(C1+C2),we can call this equation "e1" for convenience.
Now i will list out another eqution:(Vd1-V3)*C2 + (Vd1-V1)*C1=(Vd2-V3)*C2 + (Vd2-V2)*C1,we can call this equation "e2".And we can derive "e1" from "e2",so this proves that the "e2" is also right indirectly.
But i don't know why "e2" is right. Is there any charge conservation principle in the "e2"? I have been confused by this problems for long time, is there anybody who can help me solve this problem ? Thank you very much!
Now i will list out another eqution:(Vd1-V3)*C2 + (Vd1-V1)*C1=(Vd2-V3)*C2 + (Vd2-V2)*C1,we can call this equation "e2".And we can derive "e1" from "e2",so this proves that the "e2" is also right indirectly.
But i don't know why "e2" is right. Is there any charge conservation principle in the "e2"? I have been confused by this problems for long time, is there anybody who can help me solve this problem ? Thank you very much!