Current & Voltage: Understanding Resistance Limits

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SUMMARY

The discussion centers on the principles of current flow in electrical circuits, specifically addressing why current remains constant in a series circuit despite the presence of resistors. Participants reference Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). The analogy of water flow in pipes is used to illustrate that while resistance can limit flow, the current remains uniform throughout a series circuit due to the nature of series connections and the voltage source maintaining a constant potential difference.

PREREQUISITES
  • Understanding of Ohm's Law (I = V/R)
  • Basic knowledge of electrical circuits and components
  • Familiarity with series and parallel circuit configurations
  • Concept of voltage sources and their role in current flow
NEXT STEPS
  • Study the implications of Ohm's Law in various circuit configurations
  • Explore the differences between series and parallel circuits
  • Learn about Kirchhoff's laws for circuit analysis
  • Investigate practical applications of resistors in electronic devices
USEFUL FOR

Electrical engineering students, hobbyists building circuits, and anyone seeking to deepen their understanding of current flow and resistance in electrical systems.

sneha_28
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I have a basic doubt regarding concepts of current. we know that a resistor is a current limiting device. But when it is connected in series with a voltage source,current remains the same.
Why doesn't the current change even after passing through a series of current limiting resistors? what am i missing out here?
 
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sneha_28 said:
I have a basic doubt regarding concepts of current. we know that a resistor is a current limiting device. But when it is connected in series with a voltage source,current remains the same.
Why doesn't the current change even after passing through a series of current limiting resistors? what am i missing out here?

What makes you think that the current doesn't change when the resistance changes? What's your understanding of Ohm's law?
 
The way the question was worded implies adding resistance, but I think the question was why isn't the current different in different parts of the circuit.

Water analogy: why isn't flow rate lower after an obstruction in a pipe?
 

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