Charge on capacitors in a circuit?

In summary, the voltage from point a to point b is +28V and each capacitor has a capacitance of 4.00uF. To calculate the charge on each capacitor, work backwards from the equivalent capacitance to the original circuit, following the same rules for series and parallel networks.
  • #1
KingNothing
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The voltage from point a to point b is +28V.
Each capacitor has a capacitance of 4.00uF (microfarads)

What is the best way to calculate the charge on each capacitor?
 

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  • #2
Work like how you would for a resistor network. Find the equivalent capacitance then you can find the total charge. Then work your way back to the original circuit one step at a time, while finding the charge and voltage in each step. Its like working backwards from the equivalent capacitance to the original circuit. Remember the same rules that apply for series and parallel networks (in terms of voltage and current or charge in this case) will work here.
 
  • #3


The best way to calculate the charge on each capacitor is to use the formula Q = CV, where Q is the charge, C is the capacitance, and V is the voltage. In this case, since the voltage from point a to point b is +28V, the charge on each capacitor would be 4.00uF x 28V = 112 uC (microcoulombs). This formula is derived from the relationship between charge, voltage, and capacitance in a capacitor. It is important to note that the charge on a capacitor can also be calculated by integrating the current over time, but in this case where the voltage and capacitance are known, using the above formula is the most efficient method.
 

FAQ: Charge on capacitors in a circuit?

What is the charge on a capacitor in a circuit?

The charge on a capacitor in a circuit is the amount of electric charge that is stored on the capacitor's plates. It is measured in units of coulombs (C).

How does the charge on a capacitor affect the circuit?

The charge on a capacitor affects the circuit by storing energy and releasing it when the circuit is closed. It can also affect the flow of current and the voltage in the circuit.

How is the charge on a capacitor calculated?

The charge on a capacitor can be calculated using the equation Q = CV, where Q is the charge in coulombs, C is the capacitance in farads, and V is the voltage across the capacitor in volts.

What factors can affect the charge on a capacitor in a circuit?

The charge on a capacitor can be affected by the capacitance of the capacitor, the voltage across the capacitor, and the material and size of the capacitor's plates.

How can the charge on a capacitor be changed in a circuit?

The charge on a capacitor can be changed by adjusting the voltage across the capacitor, changing the capacitance of the capacitor, or by connecting the capacitor in series or parallel with other components in the circuit.

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