Resistor network and 2 voltage sources, help sought

In summary, the problem involves a circuit with a 1.00 k resistor and a 250 V source. Using a solution found online, it was determined that the current in the horizontal wire between nodes a and e is 0.05A. The solution involved redrawing the circuit and using equivalent resistance equations to solve for I1 and I2. Further hints were given to aid in understanding the solution.
  • #1
Ashley Shaw
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  • #2
Hi Ashley Shaw. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

Your original thread title of "Physics: Electromagnetism HELP!" was hardly applicable. :eek:

You've found a solution to this exact question. You can see they redrew the circuit, replacing two parallel resistors by a single resistor equivalent to those two in parallel.
 
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  • #3
Ashley Shaw said:
[Mentor note: thread title reworded]

R = 1.00 k and = 250 V in Figure P28.25, determine the direction and magnitude of the current in the horizontal wire between a and e.
http://www.webassign.net/pse/p28-23.gif
I found a solution online (http://web.mit.edu/course/8/8.02-esg/Spring03/www/8.02pset6sol.pdf) 28.23 and don't understand how they got 1.71, 2.71, or 3.71 and solved for I1 or I2.

Current flows from node a to e and the magnitude of that current is 0.05A.
 
  • #4
Ashley Shaw said:
don't understand how they got 1.71, 2.71, or 3.71 and solved for I1 or I2.

Hints..

Work out what the equivalent resistance is of a 4 Ohm in parallel with a 3Ohm.

Then with reference to the reduced circuit...

2.71R = 1.71R + R

3.71R = 1.71R + 2R
 

FAQ: Resistor network and 2 voltage sources, help sought

What is a resistor network?

A resistor network is a group of resistors connected together in a circuit. It is used to control the flow of electric current and is commonly found in electronic devices.

How does a resistor network work?

A resistor network works by reducing the amount of current flowing through it. The resistors in the network act as barriers to the flow of current, causing a voltage drop across each resistor. This results in an overall decrease in the amount of current flowing through the circuit.

What is the purpose of having 2 voltage sources in a resistor network?

The purpose of having 2 voltage sources in a resistor network is to provide two different voltage levels in the circuit. This allows for more precise control over the flow of current and can be useful in certain applications, such as in amplifiers or power supplies.

What is the difference between series and parallel resistor networks?

In a series resistor network, the resistors are connected end-to-end, creating a single path for current to flow through. In a parallel resistor network, the resistors are connected side-by-side, creating multiple paths for current to flow through. This results in different overall resistance values and current flow for each type of network.

How do you calculate the total resistance of a resistor network?

The total resistance of a resistor network can be calculated by using the following formulas:
- For resistors in series: R(total) = R1 + R2 + R3 + ...
- For resistors in parallel: 1/R(total) = 1/R1 + 1/R2 + 1/R3 + ...
Once you have calculated the total resistance, you can then use Ohm's Law (V = IR) to determine the voltage and current in the circuit.

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