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What happens to the galvanometer reading in a Wheatstone bridge when it is balan
What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?
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Practice Questions
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Q1
What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?
It shows maximum current
It shows minimum current
It shows zero current
It shows fluctuating current
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When the Wheatstone bridge is balanced, the potential difference across the galvanometer is zero, resulting in zero current.
Questions & Step-by-step Solutions
1 item
Q
Q: What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?
Solution:
When the Wheatstone bridge is balanced, the potential difference across the galvanometer is zero, resulting in zero current.
Steps: 6
Show Steps
Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances.
Step 2: Know that a galvanometer is an instrument that detects current in the circuit.
Step 3: When the Wheatstone bridge is balanced, it means the ratio of the resistances in one branch is equal to the ratio in the other branch.
Step 4: When balanced, the voltage (or potential difference) across the galvanometer becomes zero.
Step 5: Since the voltage across the galvanometer is zero, no current flows through it.
Step 6: Therefore, the reading on the galvanometer shows zero.
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