How much charge passes through a part of a circuit?

[Boxcutter]

Suppose the the two capacitors are charged fully before the switch is closed, how much charge will pass through the switch when we close it?

http://home.student.uu.se/daja8643/elec2.JPG

I've been trying for a long time but I'm lost. All help I could get would be appreciated.

/Daniel

 

[Hammie]

I would start by considering that the two capacitors really only form one without the switch closed. Can you determine the initial charge?

 

[kyle8921]

The amount of charge that passes through a part of a circuit depends on the current flowing through that part and the time interval during which the current flows. The equation Q=It, where Q is the charge, I is the current, and t is the time interval, can be used to calculate the amount of charge passing through a circuit.

In the given circuit, the capacitors are initially fully charged, so there is no current flowing through them. When the switch is closed, the capacitors will discharge and the current will flow through the switch. The amount of charge passing through the switch will depend on the value of the capacitors and the time interval during which the current flows.

To calculate the charge passing through the switch, you will need to know the capacitance of the capacitors and the resistance of the switch. You can then use the equation Q=CV, where Q is the charge, C is the capacitance, and V is the voltage across the capacitor. The voltage across the capacitor can be calculated using the equation V=IR, where I is the current and R is the resistance of the switch.

In summary, the amount of charge passing through the switch when it is closed can be calculated using the equations Q=It, Q=CV, and V=IR, where I is the current, t is the time interval, C is the capacitance, R is the resistance, and V is the voltage. It is important to note that the amount of charge passing through the switch will depend on the specific values of the components in the circuit and the time interval during which the switch is closed.