If the resistances in a Wheatstone bridge are equal, what is the potential diffe

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Question: If the resistances in a Wheatstone bridge are equal, what is the potential difference across the galvanometer?

Options:

Correct Answer: Zero

Solution:

If the resistances are equal, the potential difference across the galvanometer is zero.

If the resistances in a Wheatstone bridge are equal, what is the potential difference across the galvanometer?

If the resistances in a Wheatstone bridge are equal, what is the potential difference across the galvanometer?

Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances by balancing two legs of a bridge circuit.
Step 2: Identify the components of the Wheatstone bridge. It has four resistors (R1, R2, R3, R4) and a galvanometer.
Step 3: Recognize that if the resistances are equal, it means R1 = R2 and R3 = R4.
Step 4: When the resistances are equal, the bridge is balanced. This means that the voltage across the galvanometer is the same on both sides.
Step 5: Since the voltage is the same on both sides, there is no difference in potential, which means the potential difference across the galvanometer is zero.

Wheatstone Bridge – A circuit used to measure unknown resistances by balancing two legs of a bridge circuit.
Galvanometer – An instrument for detecting and measuring small electric currents.
Potential Difference – The difference in electric potential between two points in a circuit.
Balanced Bridge Condition – In a Wheatstone bridge, when the ratio of resistances in one leg equals the ratio in the other leg, resulting in zero current through the galvanometer.