In a Wheatstone bridge, if the galvanometer shows zero deflection, what does it

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Question: In a Wheatstone bridge, if the galvanometer shows zero deflection, what does it indicate?

Options:

Correct Answer: The bridge is balanced

Solution:

Zero deflection in the galvanometer indicates that the bridge is balanced.

In a Wheatstone bridge, if the galvanometer shows zero deflection, what does it indicate?

In a Wheatstone bridge, if the galvanometer shows zero deflection, what does it indicate?

Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown electrical resistances.
Step 2: Know that a galvanometer is an instrument used to detect small electric currents.
Step 3: When the Wheatstone bridge is set up, it has four resistors and a galvanometer connected in a specific way.
Step 4: If the galvanometer shows zero deflection, it means there is no current flowing through it.
Step 5: Zero current indicates that the voltage across the galvanometer is zero.
Step 6: When the voltage is zero, it means the two sides of the bridge are equal in voltage.
Step 7: If the two sides are equal, the bridge is said to be balanced.
Step 8: Therefore, zero deflection in the galvanometer indicates that the Wheatstone bridge is balanced.

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, indicating the balance of the bridge.
Bridge Balance – The condition where the ratio of resistances in one leg of the bridge equals the ratio in the other leg, resulting in zero current through the galvanometer.