Circuits - Transfer function of this LRC circuit

Click For Summary
The discussion revolves around verifying the transfer function of an LRC circuit with a given parameter B = 9. Participants are focused on checking the accuracy of the calculations provided, specifically pointing out a potential error where a constant was miscopied. The consensus is that the derivation appears correct aside from this minor mistake. The conversation emphasizes the importance of accuracy in circuit analysis. Overall, the community is supportive in helping ensure the correctness of the calculations.
wcjy
Messages
73
Reaction score
10
Homework Statement
Given the following circuit with the inductor L1= 8(H). The transfer function between Vo(s) and Vs(s) can be described as:
$$\frac{V_o(s)}{V_s(s)} = \frac{1}{as^3+bs^2+cs+d}$$

Find a, b, c and d in this equation. Change the inductor by L1 by another inductor L2 = B(H) such that the system has a pole at S = -2/3. Find B
Relevant Equations
-
1617012351432.png

1617011617420.png
1617011638524.png
1617011649133.png
1617011656677.png


Got B = 9.

My school doesn't provide answers, hence could someone double check if my answers is right? Thanks!
 
Last edited by a moderator:
Physics news on Phys.org
Looks good, but I think that you miscopied the constant 2 as a 3 in the final line of your derivation.
 
gneill said:
Looks good, but I think that you miscopied the constant 2 as a 3 in the final line of your derivation.
thank you so much!
 
Beams of electrons and protons move parallel to each other in the same direction. They ______. a. attract each other. b. repel each other. c. neither attract nor repel. d. the force of attraction or repulsion depends upon the speed of the beams. This is a previous-year-question of CBSE Board 2023. The answer key marks (b) as the right option. I want to know why we are ignoring Coulomb's force?
Thread 'Struggling to make relation between elastic force and height'
Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
I treat this question as two cases of Doppler effect. (1) When the sound wave travels from bat to moth Speed of sound = 222 x 1.5 = 333 m/s Frequency received by moth: $$f_1=\frac{333+v}{333}\times 222$$ (2) When the sound wave is reflected from moth back to bat Frequency received by bat (moth as source and bat as observer): $$f_2=\frac{333}{333-v}\times f_1$$ $$230.3=\frac{333}{333-v}\times \frac{333+v}{333}\times 222$$ Solving this equation, I get ##v=6.1## m/s but the answer key is...