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

AI Thread Summary
A 10% change in power supply voltage does not affect the balance of a Wheatstone bridge, as the balance condition relies solely on the ratio of the resistances (R1/R2 = R3/R4). The resistances remain constant regardless of voltage fluctuations, meaning the bridge remains balanced. However, if the voltage change affects the measurement process or introduces noise, it may necessitate recalibrating the bridge. The key point is that the balance condition itself is independent of the supply voltage. Therefore, the bridge can maintain its balance despite a 10% change in voltage.
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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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