RLC Circuit with damping questions

AI Thread Summary
The discussion revolves around an RLC circuit experiment where the user has achieved overdamping, underdamping, and critical damping by changing resistors. They need to determine the initial current (I[0]) at time t=0 to solve the differential equations and create a predicted results graph. It is suggested that using Kirchhoff's law, along with known resistance and voltage values, could allow for the calculation of the initial current. However, it is noted that calculated values may differ from actual measurements due to uncertainties, which could undermine the experiment's accuracy. The user is seeking guidance on how to proceed without redoing the experiment.
totallydesperate
Messages
2
Reaction score
0
I have an RLC Circuit. I've changed the resistors 3 times to give me a case of overdamping, underdamping, and critical damping. In taking my data (this was a long long time ago) I apparently missed taking measurements of current. I'm trying to solve the three differential equations to make a "predicted results" graph. To do this, I need initial conditions V0, which I have, and I0, which I should have. Is there any way besides redoing my experiment to determine what the current at t=0 would be? If so, what other information do you need from me to explain it to me?
 
Physics news on Phys.org
If you know the value of the resistances and the voltage, then technically you should be able to calculate the current using the Kirchoff law. Even so, keep in mind that calculated values are often a bit different from measured values due to uncertainties. If you're using a calculated value for current when you were supposed to use a measured one, it kind of misses the point.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Current in RLC Series Circuit: Need Help
Replies
2
Views
1K
Combined tensions of an RLC series circuit with AC current
Replies
3
Views
835
Calculation of current in driven series RLC circuit
Replies
8
Views
2K
RCL series circuit analysis: Damping Constant
Replies
1
Views
633
Resonant frequency of L - R||C circuit
Replies
21
Views
1K
What is the unknown circuit element in RLC circuit given plot of V, I?
Replies
4
Views
772
How to calculate quality factor for RLC circuit?
Replies
6
Views
1K
Phase problem in a damped RLC circuit
Replies
3
Views
2K
Solve RLC Circuit Problem Homework
Replies
8
Views
2K
Basic question about RLC circuits
Replies
32
Views
2K

Hot Threads

Recent Insights

Back
Top