Differential equation based on Kirchoff's voltage law

In summary, a series circuit with an inductance of 15mH, a capacitance of 35*10^(-6) F, and a resistance of 5 ohms contains a sinusoidal source of emf with a frequency of 500Hz. The charge on the capacitor will also oscillate at a frequency of 500Hz. This is known as forced oscillation and can be verified by writing out the differential equation based on Kirchoff's voltage law. It is important to assume steady state conditions for accurate results. In transients, both forced and natural responses will be present in the system.
  • #1
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a series circuit with an inductance of 15mH, a capacitance of 35*10^(-6) F and a resistance of 5 ohms conatain a sinusoidal source of emf with a frequency of 500Hz. The frequency with which the charge on the capacitor oscillates is?

i think that it should still be 500Hz, right?
 
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  • #2
Yes, you are right. This can be verified by writing out the differential equation based on Kirchoff's voltage law and solving for the current or voltage across the capacitor.

These are known as forced oscillations. Suppose you have a physical spring. If you hang a mass on it and perturb it, it will oscillate at some natural frequency. You can also of course, hold onto the mass with your hand and make it move at any frequency you desire.

Additional note: You also must assume steady state conditions. In transients you will find that there will be the forced + natural responses to a system.
 
  • #3
thank you very much!
 

Related to Differential equation based on Kirchoff's voltage law

1. What is Kirchoff's voltage law and how is it related to differential equations?

Kirchoff's voltage law is a fundamental principle in electrical circuit analysis that states the sum of voltages around a closed loop in a circuit is equal to zero. This law is related to differential equations as it can be used to formulate equations that describe the behavior of electrical circuits over time.

2. How can differential equations be used to solve problems involving Kirchoff's voltage law?

Differential equations can be used to model and solve problems involving Kirchoff's voltage law by representing the circuit components as variables and using equations derived from the law to describe the behavior of the circuit over time. These equations can then be solved using mathematical methods to determine the values of the variables at different points in time.

3. What are some common applications of using differential equations to analyze circuits using Kirchoff's voltage law?

Some common applications of using differential equations to analyze circuits using Kirchoff's voltage law include designing and troubleshooting electrical circuits, predicting the behavior of complex circuits, and optimizing circuit performance.

4. How are initial conditions incorporated into differential equations involving Kirchoff's voltage law?

Initial conditions, such as the voltage and current values at a certain point in time, are incorporated into differential equations involving Kirchoff's voltage law as the starting values for the variables. These conditions are important in determining the behavior of the circuit over time and can be obtained through measurements or assumptions.

5. Are there any limitations or assumptions associated with using differential equations to analyze circuits using Kirchoff's voltage law?

Yes, there are some limitations and assumptions associated with using differential equations to analyze circuits using Kirchoff's voltage law. These may include assuming ideal circuit components, constant values for certain variables, and neglecting certain effects such as capacitance and inductance. It is important to carefully consider these limitations and make appropriate adjustments to ensure accurate results.

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