Does a 10% Change in Power Supply Voltage Affect a Balanced Wheatstone Bridge?

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SUMMARY

A 10% change in power supply voltage does not affect the balance of a Wheatstone bridge, as the balance condition is determined solely by the ratio of the resistances (R1/R2 = R3/R4). The resistances remain constant regardless of voltage fluctuations. Therefore, while the bridge may require rebalancing after a voltage change, the fundamental balance condition remains intact. This conclusion is based on the principles of circuit theory and the characteristics of resistive components.

PREREQUISITES
  • Understanding of Wheatstone bridge configuration
  • Knowledge of electrical resistance and Ohm's Law
  • Familiarity with basic circuit theory
  • Concept of voltage and its effect on electrical circuits
NEXT STEPS
  • Study the principles of Wheatstone bridge operation in detail
  • Learn about the effects of voltage changes on circuit behavior
  • Explore methods for rebalancing a Wheatstone bridge
  • Investigate the role of temperature and resistance in circuit stability
USEFUL FOR

Students in electrical engineering, hobbyists working with circuits, and anyone interested in understanding the principles of resistive measurement techniques.

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Homework Statement



Suppose that in the course of a measurement the bridge is balanced and then the power supply voltage changes by 10%, what will happen to the balance of the bridge? Explain.

Homework Equations



No equations.

The Attempt at a Solution



When I think it out logically, I don't think the balance should be affected. Because if the voltage increases, the values of the resistances will still be balanced. Is this wrong?

But then I think if the voltage increases, you have to balance the bridge out again.
 
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What is the condition for the four resistances to make a wheatstone bridge balanced? Does the supply voltage come into it?
 
R1/R2 = R3/R4

i don't think these values would change if the voltage changes 10% during the measurements.
 

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