Voltage/Current Circuit Homework: Finding V(I) in a Network N with Ideal Sources

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In summary, the conversation discusses a problem involving a network with various components, specifically a resistor, voltage source, and current source. The task is to find V(I) by conducting two experiments, one with an ideal current source and the other with an ideal voltage source. The conversation also mentions the use of Thevenin and Norton equivalent circuits and clarifies that V(I) represents the voltage between two points, a and b. The final part of the conversation involves the exchange of hints to help solve the problem.
  • #1
erezb84
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Homework Statement


I have "network N" that includes (resistorse, voltage and current sources), and we do 2 experiments:
1. connecting idial current source, and measuring 3V
2. connecting idial voltage source, and measuring 5A.

need to find V(I)=?

The Attempt at a Solution


Nothing much...

Can someone give me a hint, please?

Thanks.
 

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  • #2
You are expected to use the Thevenin and Norton equivalent circuits perhaps?

What is V(I) supposed to represent?
 
  • #3
Yes, i am expected to use them...
V(I) for points a,b.
 
  • #4
Well... ? Have you found the Thevenin and/or Norton equivalents for the black box?

I figured that you'd want to measure Vba but you presumably want the curve or equation for the Vba as a function of current. But what current? The current in the circuit OK but which circuit? Can you tell me in words what V(I) represents?

I'm not asking these questions for information: those are hints.
 
  • #5


Hi there,

Firstly, it is important to note that in a circuit with ideal sources, the voltage and current sources will maintain their specified values regardless of the rest of the circuit. This means that the voltage across the voltage source will always be 3V, and the current through the current source will always be 5A.

To find V(I), we can use Ohm's Law, which states that V = IR, where V is the voltage, I is the current, and R is the resistance. In this case, since we know the current (5A) and the voltage (3V), we can rearrange the equation to solve for R. Once we have the value for R, we can use it to calculate V(I) using the same equation.

Another approach is to use Kirchhoff's Voltage Law (KVL) and Kirchhoff's Current Law (KCL) to analyze the circuit. KVL states that the sum of all voltage drops in a closed loop must equal the sum of all voltage rises, and KCL states that the sum of all currents entering a node must equal the sum of all currents leaving the node. By applying these laws and solving a system of equations, we can find the value of V(I).

I hope this helps to give you some direction in solving this homework problem. Good luck!
 

FAQ: Voltage/Current Circuit Homework: Finding V(I) in a Network N with Ideal Sources

What is an ideal source in a voltage/current circuit?

An ideal source is a theoretical component in a circuit that provides a constant voltage or current regardless of the load or other conditions in the circuit. It is usually represented by a battery symbol in circuit diagrams.

How do I calculate the voltage or current in a network with ideal sources?

To calculate the voltage or current in a network with ideal sources, you can use Kirchhoff's voltage and current laws. These laws state that the sum of voltages around a closed loop in a circuit is equal to zero, and the sum of currents entering and exiting a node is also equal to zero. By applying these laws to the network, you can solve for the unknown voltage or current.

What is the difference between voltage and current in a circuit?

Voltage refers to the potential difference between two points in a circuit, while current refers to the flow of electric charge through a circuit. In other words, voltage is the pressure that drives current through a circuit.

Can I use Ohm's Law to solve for voltage or current in a network with ideal sources?

No, Ohm's Law only applies to circuits with resistors. In a network with ideal sources, there may be other components, such as capacitors or inductors, which cannot be analyzed using Ohm's Law.

What are the limitations of using ideal sources in a voltage/current circuit?

Ideal sources are a simplified model of real-world power sources and have certain limitations. They do not account for the internal resistance of a power source, and they cannot account for non-ideal behaviors such as voltage drops or fluctuations. In practical circuits, ideal sources are often replaced with more accurate models to get more precise results.

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