In a Wheatstone bridge, if the ratio of resistances R1 to R2 is equal to the ratio of R3 to R4, what can be said about the bridge?
Practice Questions
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Q1
In a Wheatstone bridge, if the ratio of resistances R1 to R2 is equal to the ratio of R3 to R4, what can be said about the bridge?
The bridge is balanced.
The bridge is unbalanced.
The current through the galvanometer is maximum.
The potential difference across the galvanometer is maximum.
When R1/R2 = R3/R4, the bridge is balanced, meaning no current flows through the galvanometer.
Questions & Step-by-step Solutions
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Q
Q: In a Wheatstone bridge, if the ratio of resistances R1 to R2 is equal to the ratio of R3 to R4, what can be said about the bridge?
Solution: When R1/R2 = R3/R4, the bridge is balanced, meaning no current flows through the galvanometer.
Steps: 5
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: Identify the components of the Wheatstone bridge. There are four resistors: R1, R2, R3, and R4.
Step 3: Know the condition for balance in a Wheatstone bridge. The bridge is balanced when the ratio of the resistances R1 to R2 is equal to the ratio of R3 to R4.
Step 4: Write the condition mathematically: If R1/R2 = R3/R4, then the bridge is balanced.
Step 5: Understand what it means for the bridge to be balanced. When the bridge is balanced, no current flows through the galvanometer, which is the device used to detect current in the circuit.
