Solving Electric Circuit: Calculate I(B) w/ KVL & Function

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Discussion Overview

The discussion revolves around calculating the current I(B) in an electric circuit using Kirchhoff's Voltage Law (KVL) and a given current function. Participants seek assistance in formulating the KVL equation and clarifying the necessary parameters for the calculation.

Discussion Character

  • Technical explanation
  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant requests help in applying KVL to find I(B) using the function I(B)=0.01 (V(B) - 0.65V)^2.
  • Another participant expresses difficulty accessing the circuit diagram and suggests alternative upload methods.
  • There is a mention of a relationship where I(c) = 150 I(B), with a proposed value of I(c) being 2.781 mA.
  • Several participants inquire about the values of Vi, Ri, Vo, and R, indicating their importance for the calculations.
  • One participant confirms that the initial KVL equation provided is correct but asks for clarification on why it did not work for the original poster.
  • A later reply emphasizes the necessity of knowing specific circuit values to calculate I(B) accurately.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the calculation process, as there are multiple requests for clarification and additional information. Uncertainty remains regarding the specific values needed for the calculations and the application of KVL.

Contextual Notes

Participants mention missing values and the need for a complete question to proceed with the calculations. There is also a lack of clarity on the origin of the current function provided.

teng125
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http://www.savefile.com/files/7288537

find the current I(B) by calculation

Use the current function and KVL
the function is given as I(B)=0.01 (V(B) - 0.65V)^2

Can somebody pls show me the KVL ??
i tried to write the KVL as V(i) - I(B)R(i) - V(B) =0
then substitute into the function but doesn't work.

pls help
thanx
 
Last edited by a moderator:
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The attachment didn't work for me -- all I got was some pop-up ads and the Savefile home page or something. Can you upload it or post it somewhere else?
 
Still lots of popus and no circuit diagram. Try saving it as a pdf or jpg and uploading it to PF. If you need a free PDF writer, to to PrimoPDF.com.
 
nono,just download the file.there is a link at the bottom which u need to click on it to download

i have tried
 
What is the answer?
 
the answer is 2.781mA
Can u solve it??
pls teach me...
thanx very much
 
sorry,actually it is given that I(c) = 150 I(B)
so the answer for the I(c) is 2.781mA
 
teng125 said:
nono,just download the file.there is a link at the bottom which u need to click on it to download

i have tried
Ahhh, click the link next to the red flashing arrow thing. Got it. What are the values of Vi, Ri, Vo and R? You need those to get anywhere with the calculation. And where did that equation come from that you gave in your first post?

teng125 said:
Use the current function and KVL
the function is given as I(B)=0.01 (V(B) - 0.65V)^2
 
  • #10
the equation is given in the answer.anyway,how do u write the KVL loop eqn??
i just want to know how do u write it pls

thanx
 
  • #11
Your equation describing the loop is perfect and it works. Please tell us in detail in what way does it not work for you?

EDIT:
You meant

[tex]I_{B}(V_{B})=0.01\frac{A}{V^2}(V_{B}-0.65V)^2[/tex]

right?
 
Last edited:
  • #12
Unless I am missing something here, I don't think you can find a value for IB unless you know the values of Vi, Ri and the rest.

Please state the question in full.
 
  • #13
okok...i have the values

thank you
 

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