Can someone explain this rc circuit prob

In summary, an RC circuit is a circuit that contains both a resistor (R) and a capacitor (C) connected in series or parallel. It controls the flow of electrical current and stores electrical charge. When the circuit is first energized, the capacitor charges up to the voltage of the power supply and the current through the resistor decreases until the capacitor is fully charged. The time constant of an RC circuit is a measure of how quickly the capacitor charges or discharges and is calculated by multiplying the resistance (R) by the capacitance (C). The voltage and current in an RC circuit can be calculated using specific formulas. RC circuits are commonly used in electronic devices, systems, and vehicles for various purposes.
  • #1
christianerik
9
0
For a long period of time the switch S is
in position “b”. At t = 0 s, the switch S is
moved from position “b” to position “a”.

....3 M ohm
l---------------^^^^^^-----------------l
l........…......l
l...1 M ohm...4micro F.....l b
l---^^^^^^^^^-------------ll---------/ i
l........…......l
l.....16 V ........l a
l------------------l i-----------------------l


Find the voltage across the 1 M
center left resistor at time t1 = 4 s. Answer in units
of V.
 
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  • #2
Sorry, but you need to supply a better diagram. What you have may look OK on your screen, but it is unintelligible on my screen.
 

Related to Can someone explain this rc circuit prob

1. What is an RC circuit?

An RC circuit is a circuit that contains both a resistor (R) and a capacitor (C) connected in series or parallel. It is used to control the flow of electrical current and store electrical charge.

2. How does an RC circuit work?

In an RC circuit, the resistor limits the flow of current and the capacitor stores electrical charge. When the circuit is first energized, the capacitor begins to charge up to the voltage of the power supply. As it charges, the voltage across the capacitor increases and the current through the resistor decreases until the capacitor is fully charged. After the capacitor is fully charged, the current through the resistor stops and the capacitor remains charged until the circuit is discharged.

3. What is the time constant of an RC circuit?

The time constant of an RC circuit is a measure of how quickly the capacitor charges or discharges. It is calculated by multiplying the resistance (R) in ohms by the capacitance (C) in farads. It is represented by the symbol tau (τ) and is measured in seconds.

4. How do you calculate the voltage and current in an RC circuit?

The voltage across the capacitor in an RC circuit can be calculated using the formula V = V0(1-e-t/RC), where V0 is the initial voltage, t is the time, R is the resistance in ohms, and C is the capacitance in farads. The current through the resistor can be calculated using the formula I = (V0/R)e-t/RC.

5. What are some real-world applications of RC circuits?

RC circuits are commonly used in electronic devices and systems such as filters, timers, oscillators, and power supplies. They are also used in audio and radio frequency circuits to remove unwanted frequencies and in sensors to measure and store data. Additionally, RC circuits are used in electric vehicles to control the charging and discharging of batteries.

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