What happens to the current in the galvanometer when the Wheatstone bridge is balanced?
Practice Questions
1 question
Q1
What happens to the current in the galvanometer when the Wheatstone bridge is balanced?
Increases
Decreases
Becomes zero
Fluctuates
When the Wheatstone bridge is balanced, the current in the galvanometer becomes zero.
Questions & Step-by-step Solutions
1 item
Q
Q: What happens to the current in the galvanometer when the Wheatstone bridge is balanced?
Solution: When the Wheatstone bridge is balanced, the current in the galvanometer becomes zero.
Steps: 7
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: Realize that a galvanometer is a device used to detect small currents in the circuit.
Step 4: Learn that the bridge is considered '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 5: When the bridge is balanced, there is no difference in voltage between the two points connected to the galvanometer.
Step 6: Since there is no voltage difference, no current flows through the galvanometer.
Step 7: Therefore, when the Wheatstone bridge is balanced, the current in the galvanometer becomes zero.
