If the resistance R1 in a Wheatstone bridge is increased, what effect does it ha
Practice Questions
Q1
If the resistance R1 in a Wheatstone bridge is increased, what effect does it have on the balance condition?
The bridge becomes balanced
The bridge becomes unbalanced
No effect
Depends on other resistances
Questions & Step-by-Step Solutions
If the resistance R1 in a Wheatstone bridge is increased, what effect does it have on the balance condition?
Correct Answer: The bridge becomes unbalanced.
Step 1: Understand that a Wheatstone bridge has four resistors: R1, R2, R3, and R4.
Step 2: The bridge is balanced when the ratio of R1 to R2 is equal to the ratio of R3 to R4.
Step 3: If you increase the resistance R1, you change the ratio of R1 to R2.
Step 4: If R2 and the other resistances (R3 and R4) stay the same, the new ratio R1/R2 will be different.
Step 5: A different ratio means the balance condition is no longer satisfied.
Step 6: Therefore, increasing R1 can cause the Wheatstone bridge to become unbalanced.
Wheatstone Bridge Balance Condition – The balance condition of a Wheatstone bridge is determined by the ratio of the resistances in the two branches. If one resistance is changed, it affects the balance.
