If the Wheatstone bridge is unbalanced, what can be said about the potential difference across the galvanometer?
Practice Questions
1 question
Q1
If the Wheatstone bridge is unbalanced, what can be said about the potential difference across the galvanometer?
It is zero.
It is maximum.
It is equal to the supply voltage.
It is constant.
In an unbalanced bridge, there is a potential difference across the galvanometer, leading to maximum current flow.
Questions & Step-by-step Solutions
1 item
Q
Q: If the Wheatstone bridge is unbalanced, what can be said about the potential difference across the galvanometer?
Solution: In an unbalanced bridge, there is a potential difference across the galvanometer, leading to maximum current flow.
Steps: 7
Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances.
Step 2: Know that the Wheatstone bridge has four resistors and a galvanometer (a device that measures current).
Step 3: Recognize that the bridge is 'balanced' when the ratio of the two resistors on one side is equal to the ratio of the two resistors on the other side.
Step 4: If the bridge is 'unbalanced', it means the ratios are not equal.
Step 5: When the bridge is unbalanced, there will be a difference in voltage (potential difference) across the galvanometer.
Step 6: This potential difference causes current to flow through the galvanometer.
Step 7: The greater the unbalance, the larger the potential difference and the maximum current flow through the galvanometer.
