Understanding the Voltage Changes in an Unbalanced Wheatstone Bridge

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In an unbalanced Wheatstone Bridge, the voltage across resistors R1 and R2 does change, meaning VR2 of a balanced bridge is not equal to VR2 of an unbalanced bridge. The balance condition is defined by the equation R1/R2 = R3/R4, where R4 is adjustable. When the bridge is unbalanced, the voltage across R2 will differ from that in a balanced state. The qualitative analysis indicates that VR2 does not remain constant when the bridge is unbalanced. Understanding these voltage changes is crucial for solving related problems effectively.
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In an unbalanced Wheatstone Bridge, does the voltage across the resistors R1 and R2 change? In other words is VR2of balanced bridge=VR2 of unbalanced bridge?

I was trying to solve a problem that required qualitative analysis. It says VR2 does not change even though the bridge is unbalanced. How?

The Bridge Balance eqn is R1/R2 = R3/R4, where R4 is the variable resistor. At balanced condition, VR2 = VR4
 
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sorry. I've asked this question again in the HW-CW section. Pls do not reply to this post here.
 
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