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

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In a parallel circuit with a 5V source and three resistors, the voltage across each resistor is equal to the source voltage, which is 5V. The voltage does not change across the resistors in parallel; they all experience the same voltage. The equation V=IR is relevant for calculating current through each resistor, but the voltage across them remains constant at 5V regardless of the individual resistances. The confusion arises from trying to relate current and resistance without needing to know the current values. Thus, the voltage across any of the resistors in this setup is simply 5V.
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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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