Question: If the Wheatstone bridge is balanced, what is the potential difference across the galvanometer?
Options:
Maximum.
Minimum.
Zero.
Equal to the supply voltage.
Correct Answer: Zero.
Solution:
When the bridge is balanced, the potential difference across the galvanometer is zero.
If the Wheatstone bridge is balanced, what is the potential difference across th
Practice Questions
Q1
If the Wheatstone bridge is balanced, what is the potential difference across the galvanometer?
Maximum.
Minimum.
Zero.
Equal to the supply voltage.
Questions & Step-by-Step Solutions
If the Wheatstone bridge is balanced, 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 electrical resistances.
Step 2: Know that the Wheatstone bridge has four resistors arranged in a diamond shape.
Step 3: Identify the galvanometer, which is a device that measures current and is connected between the two midpoints of the resistors.
Step 4: Learn what it means for the bridge to be balanced. This occurs when the ratio of the two resistors on one side is equal to the ratio of the two resistors on the other side.
Step 5: When the bridge is balanced, the current through the galvanometer is zero because there is no potential difference across it.
Step 6: Conclude that if there is no current, the potential difference across the galvanometer is also zero.
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, which shows zero current when the bridge is balanced.
Balanced Condition – A state in a Wheatstone bridge where the ratio of resistances in one leg equals the ratio in the other leg, resulting in no current flow through the galvanometer.
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