What happens to the galvanometer reading in a Wheatstone bridge when it is balan

₹0.0

Question: What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?

Options:

Correct Answer: It shows zero current

Solution:

When the Wheatstone bridge is balanced, the potential difference across the galvanometer is zero, resulting in zero current.

What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?

What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?

Correct Answer: Galvanometer reading is zero.

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.

Wheatstone Bridge Balance – In a balanced Wheatstone bridge, the ratio of resistances in one branch is equal to the ratio in the other, leading to no potential difference across the galvanometer.
Galvanometer Function – A galvanometer measures current; when balanced, it indicates zero current due to zero potential difference.