What is the potential difference across the galvanometer in a balanced Wheatston

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Question: What is the potential difference across the galvanometer in a balanced Wheatstone bridge?

Options:

Correct Answer: Zero

Solution:

In a balanced Wheatstone bridge, the potential difference across the galvanometer is zero, indicating no current flows through it.

What is the potential difference across the galvanometer in a balanced Wheatstone bridge?

What is the potential difference across the galvanometer in a balanced Wheatstone bridge?

Correct Answer: Zero

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: Know what 'balanced' means in this context. A Wheatstone bridge is balanced when the ratio of the resistances in one leg is equal to the ratio in the other leg (R1/R2 = R3/R4).
Step 4: Recognize the role of the galvanometer. The galvanometer measures current, and it is connected between the two midpoints of the bridge.
Step 5: Understand what happens when the bridge is balanced. When the ratios are equal, the potential difference (voltage) across the galvanometer is zero.
Step 6: Conclude that since the potential difference is zero, no current flows through the galvanometer.

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