Why is Current Same in Series Resistor Circuit?

In summary, resistance is the opposition to the flow of current in a circuit. In a series resistive circuit, the current remains the same because the voltage source adjusts the current based on the total resistance in the circuit. This can be seen by adding or removing a load, which changes the current value. Another way to understand this is through the conservation of energy principles, where the voltage source calculates the amount of current based on the resistance in the circuit. The current is a fixed quantity of electrons that must pass through the resistance, causing a voltage drop.
  • #1
soft land
2
0
resistance is oppsition to the flow of current then why the current is same in series resistive ciruit..??
 
Engineering news on Phys.org
  • #2
Any complex circuit can be simplified, this being the case -- what does current see entering a circuit?
 
  • #3
Remove or add a load and you will see that the current value changes.
 
  • #5
soft land, if you have a voltage source connected to one resistance, what will happen is that the voltage source will look through it's terminals finds the amount of resistance connected to it and figure out who much current it can give to the circuit by applying ohm's law and then outputs that current. now if you connect two resistances in series the voltage source will again look at it's terminal only this time to find that the resistance have increased thus adjusting the current given to the circuit.

Also another way to look at it is that the current is a given quantity of electrons flowing through the resistance. when the current passes through the resistance or "opposition" it slows down but it must pass -where else would it go- this slow-down is simply the voltage drop across the resistance.
 

1. Why is the current the same in a series resistor circuit?

In a series resistor circuit, the resistors are connected in a single path, so the current flowing through each resistor is the same. This is due to the conservation of charge, which states that the same amount of current that enters a point in a circuit must also leave that point.

2. How does the resistance affect the current in a series resistor circuit?

The resistance of a resistor affects the current in a series circuit by reducing the flow of electrons. As the resistance increases, the current decreases. This is described by Ohm's law, which states that the current is inversely proportional to the resistance.

3. Can the current be different in a series resistor circuit?

No, the current cannot be different in a series resistor circuit. As mentioned before, the current is the same at all points in a series circuit due to the conservation of charge. This means that the current flowing into the circuit must be equal to the current flowing out of the circuit.

4. What happens to the voltage in a series resistor circuit?

In a series resistor circuit, the voltage is divided among the resistors. This means that the total voltage of the circuit is equal to the sum of the voltage drops across each resistor. The voltage drop is directly proportional to the resistance, so the higher the resistance of a resistor, the larger its voltage drop will be.

5. How do I calculate the total current in a series resistor circuit?

To calculate the total current in a series resistor circuit, you can use Ohm's law (I = V/R) to find the current through each resistor. Then, use Kirchhoff's current law, which states that the sum of all currents entering a node must be equal to the sum of all currents leaving a node. The total current will be the same as the current through each individual resistor.

Similar threads

Replies
10
Views
1K
  • Electrical Engineering
Replies
19
Views
2K
Replies
93
Views
5K
Replies
3
Views
1K
  • Electrical Engineering
Replies
3
Views
441
Replies
6
Views
954
Replies
8
Views
2K
  • Electrical Engineering
2
Replies
44
Views
4K
  • Electrical Engineering
Replies
1
Views
798
  • Electrical Engineering
Replies
19
Views
3K
Back
Top