What happens to the current in the galvanometer when the Wheatstone bridge is ba

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Question: What happens to the current in the galvanometer when the Wheatstone bridge is balanced?

Options:

Correct Answer: Becomes zero

Solution:

When the Wheatstone bridge is balanced, the current in the galvanometer becomes zero.

What happens to the current in the galvanometer when the Wheatstone bridge is balanced?

What happens to the current in the galvanometer when the Wheatstone bridge is balanced?

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.

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.
Balanced Condition – Occurs when the ratio of resistances in the two legs of the bridge is equal, resulting in no current flow through the galvanometer.