Solving Complex Circuits - Voltage & Current w/ Resistance

In summary, the conversation involves determining the voltage and current across each resistor in a given circuit. The total resistance is found to be 36.7 ohms, but without a specific voltage source, the answer must be expressed in terms of "E". This can be done using voltage division, where the voltage across each resistor is equal to the voltage source multiplied by the individual resistance divided by the total resistance.
  • #1
anonymous820
23
0

Homework Statement



PHYSICS.jpg


R=resistor

determine the voltage across and the current through each resistor for the circuit.

The Attempt at a Solution



1&2=parallel 1/50+1/25=3/50 --> 50/3=16.7 ohms

3&4=parallel 1/10+1/10=1/5 --> 5 ohms

5&6=series 5+10=15 ohms

total resistance=36.7 ohms

so my question is how do you figure out the current and voltage with just the resistance given to you?
 
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  • #2
Did they give you a battery voltage or emf?
 
  • #3
nope. that's why i can't figure out anything besides the resistance. i don't even think the question has possible answer.
 
  • #4
If you're not given a number for E, the answer has to be expressed in terms of E.
Then use voltage division immediately (no loop or node equations necessary)
R = total equivalent resistance
V across (R1 parallel R2) = E ( [R1 parallel R2] / R)
V across (R3 parallel R4) = E ( [R3 parallel R4] / R)
Voltage across R5 = E (R5 / R)
Voltage across R6 = E (R6 / R)
 
  • #5
what does the E stand for? current?
 
  • #6
I meant voltage source E. I got you mixed up with someone else who had a battery named E.
 

1. What is a complex circuit?

A complex circuit is a circuit that contains multiple components such as resistors, capacitors, and inductors that are connected in series or parallel. These circuits can be difficult to analyze and require a thorough understanding of circuit analysis techniques.

2. What is voltage in a circuit?

Voltage is the electrical potential difference between two points in a circuit. It is measured in volts and represents the amount of energy required to move an electric charge from one point to another.

3. What is current in a circuit?

Current is the flow of electric charge through a circuit. It is measured in amperes (amps) and represents the rate at which electric charges are moving through a circuit.

4. What is resistance in a circuit?

Resistance is the opposition to the flow of electric current. It is measured in ohms and is caused by the physical properties of a material. Components such as resistors are used to control and limit the amount of current flowing through a circuit.

5. How do you solve for voltage and current in a complex circuit with resistance?

To solve for voltage and current in a complex circuit with resistance, you will need to apply Ohm's Law, Kirchhoff's Laws, and other circuit analysis techniques. Start by identifying the components in the circuit and their values. Then, use Ohm's Law (V = IR) to calculate the voltage across each component and the current flowing through it. Next, use Kirchhoff's Laws (Kirchhoff's Voltage Law and Kirchhoff's Current Law) to analyze the circuit and determine the voltage and current values for the entire circuit. Finally, use these values to check for the overall consistency of the circuit and make any necessary adjustments.

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