In a balanced Wheatstone bridge, what is the potential difference across the gal
Practice Questions
Q1
In a balanced Wheatstone bridge, what is the potential difference across the galvanometer?
Equal to the supply voltage
Zero
Equal to the resistance
Depends on the resistances
Questions & Step-by-Step Solutions
In a balanced Wheatstone bridge, what is the potential difference across the galvanometer?
Correct Answer: Zero
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 a Wheatstone bridge has four resistors and a galvanometer (a device that measures current).
Step 3: Learn what 'balanced' means in this context. A balanced Wheatstone bridge means that the ratio of the resistances in one leg is equal to the ratio in the other leg.
Step 4: When the bridge is balanced, the current through the galvanometer is zero because there is no potential difference to drive current through it.
Step 5: Therefore, the potential difference across the galvanometer is also zero when the bridge is balanced.
