Differential Equations RLC Circuits

In summary, a series RLC circuit with an electromotive force of E=200e^(-100t) V, a resistor of 80 ohms, an inductor of 0.2 H, and capacitor of 5x10^-6 F is being discussed. The problem is to find the current at any time t>0 given an initial current and charge of zero. The current I(t) is the same throughout all three components (R, L, and C) due to them being in series. The voltage drop across each component is represented by V_R(t), V_L(t), and V_C(t), and there are equations relating I(t) to each of these voltages. The sum of these three volt
  • #1
kings13
27
0

Homework Statement



A series RLC circuit has an electromotive force given by E=200e^(-100t) V, a resistor of 80 ohms, an inductor of 0.2 H, and capacitor of 5x10^-6 F. If the initial current and charge on the capacitor are zero, find the current at any time t>0.


Homework Equations



??

The Attempt at a Solution



i am not begging for someone to solve the whole problem for me, just to get it started
 
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  • #2
OK, start by observing that the same current is flowing through all three components (R, L and C) at any time t because they are in series. Call this current [itex]I(t)[/itex].

Let the voltage drop across each of the components be represented by [itex]V_R(t), V_L(t)[/itex] and [itex]V_C(t)[/itex].

Can you now list some equations relating [itex]I(t)[/itex] to each of those voltages?

What can you say about the sum of those three voltages (Kirchoff's laws)?
 

FAQ: Differential Equations RLC Circuits

What is a differential equation?

A differential equation is a type of mathematical equation that involves derivatives, which are measures of how a quantity changes over time. It relates an unknown function to its derivatives and other known quantities.

What is an RLC circuit?

An RLC circuit is an electrical circuit consisting of a resistor (R), inductor (L), and capacitor (C) connected in series or parallel. These circuits are commonly used in electronic devices to control the flow of electricity.

How are differential equations used in RLC circuits?

Differential equations are used to describe the behavior of RLC circuits over time. By modeling the circuit as a system of differential equations, we can predict how the voltage and current will change in response to different inputs or disturbances.

What are the applications of RLC circuits in real life?

RLC circuits are used in a variety of electronic devices, such as radios, televisions, and computers. They are also important in power systems, as they can be used to filter out unwanted signals and stabilize voltage levels.

What are the challenges in solving differential equations for RLC circuits?

Solving differential equations for RLC circuits can be challenging due to the complex nature of the equations and the need for advanced mathematical techniques. Additionally, real-life RLC circuits may have non-ideal components and external factors that can make the equations even more difficult to solve accurately.

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