Question: In a Wheatstone bridge, if the galvanometer shows a current, what does it indicate?
Options:
The bridge is balanced
The bridge is unbalanced
The resistances are equal
The circuit is open
Correct Answer: The bridge is unbalanced
Solution:
A current in the galvanometer indicates that the bridge is unbalanced.
In a Wheatstone bridge, if the galvanometer shows a current, what does it indica
Practice Questions
Q1
In a Wheatstone bridge, if the galvanometer shows a current, what does it indicate?
The bridge is balanced
The bridge is unbalanced
The resistances are equal
The circuit is open
Questions & Step-by-Step Solutions
In a Wheatstone bridge, if the galvanometer shows a current, what does it indicate?
Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown electrical resistances.
Step 2: Know that a Wheatstone bridge has four resistors and a galvanometer (a device that detects current).
Step 3: When the bridge is balanced, no current flows through the galvanometer.
Step 4: If the galvanometer shows a current, it means there is a difference in resistance between the two sides of the bridge.
Step 5: This difference indicates that the bridge is unbalanced, meaning the resistances are not equal.
Wheatstone Bridge – A circuit used to measure unknown electrical resistances by balancing two legs of a bridge circuit.
Galvanometer – An instrument for detecting and measuring small electric currents.
Balance Condition – In a Wheatstone bridge, balance occurs when the ratio of resistances in one leg equals the ratio in the other leg, resulting in zero current through the galvanometer.
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