Resistance, Current and Voltages

In summary, in a circuit with mixed resistances, the elements in series will have the same current and the elements in parallel will have the same voltage drop. However, not all elements will have this relationship and for complicated relationships, more complex rules such as Kirchhoff's laws may be needed. The node-voltage method is often used to solve circuits with mixed resistances.
  • #1
Chris914
6
1
When there is a current of mixed resistances (like parallel and series together), how do voltage drop and current relate throughout the circuit?
 
Physics news on Phys.org
  • #2
Elements in series always have the same current, and elements in parallel always have the same voltage drop. You just need to take care to determine whether two elements are actually in series/parallel; not all elements have this sort of relationship in every circuit.
 
  • #3
Sounds like a homework question to me.
For complicated relationships between elements, you need more complicated rules ... like kirchhoffs laws.
 
  • #4
Chris914 said:
When there is a current of mixed resistances (like parallel and series together), how do voltage drop and current relate throughout the circuit?
Usually I like to solve circuits using the node-voltage method.

http://mathonweb.com/help/backgd5.htm
 
  • #5


When there is a current of mixed resistances in a circuit, the voltage drop and current are related through Ohm's law, which states that the voltage drop (V) across a resistor is equal to the current (I) flowing through it multiplied by the resistance (R) of the resistor (V = IR). In a parallel and series circuit, the voltage drop and current will vary depending on the arrangement of the resistors.

In a parallel circuit, the voltage drop across each resistor will be the same, while the current will be divided among the resistors. This means that the total current in the circuit will be equal to the sum of the currents in each branch. In a series circuit, the current is the same throughout the circuit, while the voltage drop is divided among the resistors. This means that the total voltage in the circuit will be equal to the sum of the voltage drops across each resistor.

In a mixed resistance circuit, the voltage drop and current will depend on the specific arrangement of the resistors. Each resistor will have its own voltage drop and current, which will affect the overall voltage and current in the circuit. It is important to calculate the total resistance in the circuit using the rules for combining resistors in parallel and series, in order to accurately determine the voltage drop and current in the circuit.

Overall, the voltage drop and current in a mixed resistance circuit are interdependent and can be calculated using Ohm's law and the rules for combining resistors in parallel and series. Understanding these relationships is crucial for analyzing and designing circuits in various applications.
 

1. What is resistance?

Resistance is the measure of opposition to the flow of electric current in a material. It is measured in ohms (Ω) and is determined by the type of material, its dimensions, and temperature.

2. What is current?

Current is the flow of electric charge through a conductor. It is measured in amperes (A) and is caused by the movement of electrons.

3. What is voltage?

Voltage, also known as electric potential difference, is the force that drives electric current. It is measured in volts (V) and can be thought of as the potential energy per unit charge.

4. How are resistance, current, and voltage related?

According to Ohm's Law, resistance is equal to the ratio of voltage to current. This means that as the voltage increases, the current also increases, but as the resistance increases, the current decreases.

5. How does resistance affect the flow of current?

Resistance causes the flow of current to decrease. This is because the resistance restricts the movement of electrons, making it harder for them to flow through the material. As a result, the current decreases and less charge is able to flow through the circuit.

Similar threads

  • Electromagnetism
Replies
16
Views
659
Replies
6
Views
858
Replies
25
Views
1K
Replies
17
Views
1K
Replies
9
Views
3K
Replies
6
Views
756
  • Electromagnetism
Replies
11
Views
1K
Replies
6
Views
2K
Replies
8
Views
1K
  • Electromagnetism
Replies
4
Views
1K
Back
Top