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.
No concepts available.
