Exploring the Limitations of Ohm's Law for Electric Circuits

In summary, Ohm's Law is not an effective method for solving some electric circuits because it doesn't account for the relationship between the number of branch points and the number of independent current in a circuit.
  • #1
hidayah
8
0
Why is Ohm's Law not an effective method for solving some electric circuits?
 
Physics news on Phys.org
  • #2
Hye! Why is Ohm's law not an effective method for solving some electric circuits?
 
  • #3
why does the loop rule arise as a consequence of conservation of energy?
 
  • #4
what is the relationship between the number of branch points and the number of independent current in a circuits?
 
  • #5
why is Ohm's Law not an effective method for solving some electric circuits??
 
  • #6
Smells like very simple homework. I'm moving this to the k-12 homework section.
hidayah, have you tried just looking these up in your textbook?
 
  • #7
HallsofIvy said:
hidayah, have you tried just looking these up in your textbook?
Why not dispense with formalities and list the QUESTION numbers, too. =D

1) Why is Ohm's Law not an effective method for solving some electric circuits?
2) Why does the loop rule arise as a consequence of conservation of energy?
3) What is the relationship between the number of branch points and the number of independent current in a circuits?
...

These are questions that test your understanding of Ohm's law. It sounds like you're having trouble with them because you haven't read the material.
:tongue:
 
  • #8
Your first question is very vague.

As for the 2nd and 3rd. You should think about water flowing through a pipe. Where the flowing water can be thought of as the electricity.

.....//
....//
======
....\\
..... \\

When the one pipe splits into two at a junction some of the water will flow down one pipe and some down the other. How much water flows down each one can be related to say the width of the pipes. Of course the width of the pipes are analogous to the resistance of the wire.

Now the sum of the currents going into each pipe or wire is equal that which has come from the main pipe. This in lay-mans terms is Kirchoffs law.

Hope this helps... :smile:
 

1. What is Ohm's Law?

Ohm's Law is a basic principle in physics that describes the relationship between voltage, current, and resistance in an electric circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them.

2. What are the limitations of Ohm's Law?

While Ohm's Law is a useful tool for understanding and predicting the behavior of simple electric circuits, it has its limitations. One limitation is that it only applies to linear circuits, where the current is directly proportional to the voltage. It also assumes that the resistance remains constant, which may not always be the case in real-world circuits.

3. How can we explore the limitations of Ohm's Law?

The limitations of Ohm's Law can be explored through experiments and simulations. By varying the voltage, current, and resistance in a circuit, we can observe how Ohm's Law holds up and identify situations where it may not accurately predict the behavior of the circuit. Additionally, advanced mathematical models can be used to analyze more complex circuits and determine the limitations of Ohm's Law.

4. Why is it important to understand the limitations of Ohm's Law?

Understanding the limitations of Ohm's Law is crucial for accurately analyzing and designing electric circuits. If we rely solely on Ohm's Law, we may encounter unexpected results or make incorrect predictions in more complex circuits. By understanding its limitations, we can use Ohm's Law as a tool in conjunction with other principles to better understand and control electric circuits.

5. How do the limitations of Ohm's Law impact practical applications?

The limitations of Ohm's Law can have a significant impact on practical applications involving electric circuits. For example, in high voltage or high frequency circuits, the resistance may not be constant and Ohm's Law may not accurately predict the behavior. This can lead to safety hazards or malfunctioning equipment if not taken into consideration during the design and analysis process.

Similar threads

  • Introductory Physics Homework Help
Replies
3
Views
488
  • Introductory Physics Homework Help
2
Replies
42
Views
866
  • Introductory Physics Homework Help
Replies
7
Views
612
  • Introductory Physics Homework Help
Replies
3
Views
810
  • Introductory Physics Homework Help
Replies
4
Views
209
  • Introductory Physics Homework Help
Replies
3
Views
508
  • Introductory Physics Homework Help
Replies
12
Views
984
  • Introductory Physics Homework Help
2
Replies
44
Views
745
  • Introductory Physics Homework Help
Replies
4
Views
928
  • Introductory Physics Homework Help
Replies
16
Views
927
Back
Top