What is the voltage in the inductor or capacitor for a short/open circuit?

In summary, the conversation discusses the need to find the voltages v1 and v2 at t=0+ and t=0- in a circuit with a 3.2 Ω unlabeled resistor. The speaker suggests using mesh analysis to find the currents and then using that information to calculate the voltages at different points in the circuit. They also mention that the subject is supposed to be about steady state, but the given times are not in steady state. The conversation concludes with the speaker discussing their assumptions about the accuracy of the calculations at different times.
  • #1
sdfanm16
3
0
Screenshot from 2016-05-13 16-37-12.png

Homework Statement



{Moderator edit: The unlabeled resistance is given to be 3.2 Ω }

finding v1 and v2 at t=0+ and t=0- is needed

Homework Equations

The Attempt at a Solution


Screenshot from 2016-05-13 16-43-03.png

ok I've found the currents by mesh analysis but how can i get the voltage?What voltage is in the inductor or capacitor if its a short/open circuit?
Tal
 
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  • #2
Now you know the current flowing, you can work out the voltage at any point or the voltage across any component. Find the voltage across the capacitor.

Say find the voltage at the RH end of the 3Ω.
Then the junction of the 1Ω Rs
Then at the 1Ω 3Ω junction. Voila.
 
  • #3
sdfanm16 said:
finding v1 and v2 at t=0+ and t=0- is needed
The subject says: "dc steady state", yet t=0+ is far from steady state. So which are you wanting to find?

You seem to know that the unlabelled resistor is 3.2 Ω?
 
  • #4
NascentOxygen said:
The subject says: "dc steady state", yet t=0+ is far from steady state. So which are you wanting to find?

You seem to know that the unlabelled resistor is 3.2 Ω?
yes I've forgot to wrote this. it's given.
 
  • #5
My guess was that you had to find v1 at t=0- when it is stable and to find v2 at t=0+ when it is maximum.
v2 at t=0- is trivial and v1 at t =0+ I would assume is the same as at t=0- , otherwise you would need to know how + t is!
As t →0 both become more accurate.
 

1. What is DC steady state?

DC steady state refers to the state of a system where all variables have reached a constant, unchanging value. In other words, the system has reached a stable equilibrium and there is no change in the system over time.

2. How is DC steady state different from AC steady state?

DC steady state only applies to direct current (DC) systems, where the current flows in one direction. AC steady state, on the other hand, applies to alternating current (AC) systems, where the current changes direction periodically.

3. Why is DC steady state important in scientific research?

DC steady state is important in scientific research because it allows scientists to study the behavior of a system under constant conditions. This can help in understanding how the system works and predicting its future behavior.

4. What factors can affect DC steady state?

There are several factors that can affect DC steady state, such as changes in external conditions, variations in the input parameters, and disturbances in the system. These factors can cause the system to deviate from its steady state and require adjustments to maintain stability.

5. How is DC steady state achieved in a system?

DC steady state is achieved when the input and output of a system are balanced, meaning that the energy or signal entering the system is equal to the energy or signal leaving the system. This can be achieved through proper design and control of the system, as well as minimizing external influences.

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