Do RC Circuits Stop Current Flow Through Capacitors Initially?

In summary, the conversation is about a circuit in a textbook that includes a 9v battery, a resistor R1, and a series of resistor R2 and capacitor C1. The question is whether there is a current flowing through R1 and C1, and if this is in line with Ohm's law. The conversation ends with the realization that DC voltage supplies produce zero currents through capacitors.
  • #1
Moneer81
159
2
While working on an example in my Circuit Analysis textbook, I came upon the following circuit: A 9v battery is connected to a resistor R1 (this is the left loop of the circuit). It is also connected to a resistor R2 and a capacitor C1 that are in series (that is the right loop). The authors are claiming that no current flows through R1 and C1. Is that true? aren't we suppose to see a current flowing through both loops according to Ohm's law?
 
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  • #2
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is this the circuit?
 
  • #3
oh never mind I just remembered that DC voltage supplies produce zero currents through capacitors
 
  • #4
Moneer81 said:
oh never mind I just remembered that DC voltage supplies produce zero currents through capacitors

after the time constant yes, but initially there is a current
 

FAQ: Do RC Circuits Stop Current Flow Through Capacitors Initially?

What is an RC circuit?

An RC circuit is a type of electrical circuit that consists of a resistor (R) and a capacitor (C) connected in series or parallel. It is commonly used in electronic devices to control the flow of electric current.

What is the purpose of an RC circuit?

The purpose of an RC circuit is to store and release electrical energy at a controlled rate. It can also be used to filter and modify signals in electronic circuits.

How does an RC circuit work?

An RC circuit works by charging and discharging the capacitor through the resistor. When a voltage is applied to the circuit, the capacitor charges up to the same voltage as the source, and then discharges through the resistor. This process continues until the capacitor is fully charged or discharged.

What is the time constant of an RC circuit?

The time constant of an RC circuit is the time it takes for the capacitor to charge or discharge to 63.2% of its maximum voltage. It is calculated by multiplying the resistance (R) and the capacitance (C) in the circuit.

How do you calculate the voltage across a capacitor in an RC circuit?

The voltage across a capacitor in an RC circuit can be calculated using the formula V(t) = V0 * (1 - e^(-t/RC)), where V(t) is the voltage at time t, V0 is the initial voltage, R is the resistance, C is the capacitance, and e is the mathematical constant equal to approximately 2.718.

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