If the resistance of one of the arms in a Wheatstone bridge is increased, what e

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Question: If the resistance of one of the arms in a Wheatstone bridge is increased, what effect does it have on the balance condition?

Options:

Correct Answer: The bridge becomes unbalanced.

Solution:

Increasing the resistance in one arm disrupts the balance condition, causing the bridge to become unbalanced.

If the resistance of one of the arms in a Wheatstone bridge is increased, what effect does it have on the balance condition?

If the resistance of one of the arms in a Wheatstone bridge is increased, what effect does it have on the balance condition?

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 arms of the Wheatstone bridge. There are four resistors in total, arranged in a diamond shape.
Step 3: Recognize the balance condition. The bridge is balanced when the ratio of the resistances in one arm equals the ratio in the other arm.
Step 4: Consider what happens when you increase the resistance in one arm. This changes the ratio of resistances in that arm.
Step 5: Realize that changing the resistance in one arm disrupts the balance condition. The ratios are no longer equal.
Step 6: Conclude that the bridge becomes unbalanced when the resistance in one arm is increased.

Wheatstone Bridge Balance Condition – The balance condition of a Wheatstone bridge occurs when the ratio of resistances in one arm equals the ratio in the other arm, allowing for no current to flow through the galvanometer.
Effect of Resistance Change – Increasing the resistance in one arm alters the ratio of resistances, leading to an imbalance in the bridge.