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

[munchy35]

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.

 

[willem2]

What is the condition for the four resistances to make a wheatstone bridge balanced? Does the supply voltage come into it?

 

[munchy35]

R1/R2 = R3/R4

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