Solve the circuit and find all the currents in the circuit

  • Thread starter Thread starter hmzi123
  • Start date Start date
  • Tags Tags
    Circuit Currents
AI Thread Summary
The discussion focuses on solving a circuit homework problem using Kirchhoff's laws to find all currents (I's) and the effective voltage (Uef). Participants emphasize the need to write Kirchhoff's Voltage Law (KVL) equations for the circuit loops and clarify that five equations are necessary to solve for the five unknown currents. There is confusion about the circuit element labeled "Ub" and its function, as well as the meaning of "J = 1 A," which is identified as equivalent to I2. The conversation highlights the importance of understanding circuit conventions and the relationships between circuit elements to effectively apply the laws. Understanding these concepts is crucial for successfully solving the circuit problem.
hmzi123
Messages
7
Reaction score
0
Homework Statement
Solve the circuit and find all the currents in the circuit.
Relevant Equations
Kirchhoff's circuit laws
1.png

Hello, i have this circuit as a homework. And i have to find all the I's, and Uef, i got stuck at writing Kirchhoff's laws in this circuit, do you think you can help me write them, and also can you explain how can i calculate Uef?
 
Physics news on Phys.org
hmzi123 said:
Homework Statement:: Solve the circuit and find all the currents in the circuit.
Relevant Equations:: Kirchhoff's circuit laws

View attachment 263806
Hello, i have this circuit as a homework. And i have to find all the I's, and Uef, i got stuck at writing Kirchhoff's laws in this circuit, do you think you can help me write them, and also can you explain how can i calculate Uef?
Welcome to the PF. :smile:

The PF rules require that you show your best effort at working the problem before we can offer tutorial assistance. Start by writing the KVL equations for the loops that are shown -- we will check your work. Thanks.
 
Ok, I'm sorry. After writing there I don't know how to continue to find any I, and also I don't know how to calculate Uef.
 

Attachments

  • IMG_20200531_074744.jpg
    IMG_20200531_074744.jpg
    36.8 KB · Views: 149
I do not understand the circuit element Ub with the double arrow inside the circle. Can you explain it? Also, what does "J = 1 A" represent and what is its relation to I2?

You have 5 unknown currents, I1-I5. That means you need a total of 5 equations to solve as a system of linear equations.
 
The ub with 2 arrows is the start of the circuit, and J=I2= 1A.
 
hmzi123 said:
The ub with 2 arrows is the start of the circuit, and J=I2= 1A.
Is Ub a battery? If so, do you know its voltage? Also is the convention that the arrows inside the circles point from the negative to the positive pole of the battery?

What does "start of the circuit" mean? You can start anywhere when you apply the voltage rule, no?
 
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 »

Similar threads

Current through an inductor as a function of time
Replies
10
Views
307
Using Kirchhoff's Rule - Theory question
Replies
8
Views
2K
Homework assignment that I was able to solve using EDO, but need to use Laplace now
Replies
5
Views
972
Find the current through a complicated circuit
Replies
39
Views
4K
Determining Inductance L in an LC Circuit
Replies
5
Views
2K
Calculation of current in driven series RLC circuit
Replies
8
Views
2K
Current in a circuit without external resistance
Replies
8
Views
2K
Understanding example in Wikipedia entry for open circuit voltage
Replies
3
Views
2K
Combined tensions of an RLC series circuit with AC current
Replies
3
Views
827
Calculating of currents in a circuit
Replies
2
Views
712

Hot Threads

Recent Insights

Back
Top