What Is the Voltage Across a Resistor in a Parallel Circuit?

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SUMMARY

The voltage across each resistor in a parallel circuit is equal to the voltage of the power source. In this case, with a 5V power supply and three resistors connected in parallel, each resistor experiences a voltage of 5V. The formula V=IR is applicable for calculating current through each resistor, but the voltage remains constant across all components in parallel. Therefore, the voltage across any one of the resistors is definitively 5V.

PREREQUISITES
  • Understanding of Ohm's Law (V=IR)
  • Knowledge of parallel circuit configurations
  • Familiarity with voltage sources
  • Basic circuit analysis skills
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  • Study the characteristics of parallel circuits in electrical engineering
  • Learn how to calculate total resistance in parallel circuits
  • Explore the implications of varying resistor values on current distribution
  • Investigate the effects of adding more resistors to a parallel circuit
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Homework Statement


A circuit with one 5V and 3 resistors in parallel. What is the voltage across one of the resistors?


Homework Equations


V=IR


The Attempt at a Solution


5/3 V??

or should i put
R1 = 5V/I -R2-R3 V

how do we get voltage across one of the resistors without being given current or current of each resistor?
 
Physics news on Phys.org
If you have 3 resistors in parallel with a voltage source then the output of the voltage source is directly onto each of the 3 resistors.
 

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