What happens to the sensitivity of a Wheatstone bridge if the resistances are made equal?
Practice Questions
1 question
Q1
What happens to the sensitivity of a Wheatstone bridge if the resistances are made equal?
Sensitivity increases
Sensitivity decreases
Sensitivity remains the same
Sensitivity becomes infinite
If the resistances are made equal, the sensitivity of the Wheatstone bridge becomes infinite, as even a small change will cause a large deflection.
Questions & Step-by-step Solutions
1 item
Q
Q: What happens to the sensitivity of a Wheatstone bridge if the resistances are made equal?
Solution: If the resistances are made equal, the sensitivity of the Wheatstone bridge becomes infinite, as even a small change will cause a large deflection.
Steps: 6
Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances by balancing two legs of a bridge circuit.
Step 2: Know that the Wheatstone bridge has four resistors: R1, R2, R3, and R4.
Step 3: When the resistances R1 and R2 are equal, and R3 and R4 are also equal, the bridge is balanced.
Step 4: Sensitivity in this context refers to how much the output changes when there is a small change in resistance.
Step 5: If R1 = R2 and R3 = R4, even a tiny change in one of the resistors will cause a large change in the output voltage.
Step 6: This means that the sensitivity of the Wheatstone bridge becomes very high, or infinite, because the output reacts strongly to small changes.
