In a Wheatstone bridge, if the resistance R2 is decreased, what effect does it h

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Question: In a Wheatstone bridge, if the resistance R2 is decreased, what effect does it have on the balance condition?

Options:

Correct Answer: It will unbalance the bridge.

Solution:

Decreasing R2 will disturb the balance condition, causing the bridge to become unbalanced.

In a Wheatstone bridge, if the resistance R2 is decreased, what effect does it have on the balance condition?

In a Wheatstone bridge, if the resistance R2 is decreased, 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 components of the Wheatstone bridge. It has four resistors: R1, R2, R3, and R4.
Step 3: Know the balance condition. The bridge is balanced when the ratio of R1 to R2 is equal to the ratio of R3 to R4.
Step 4: Recognize what happens when R2 is decreased. If R2 becomes smaller, the ratio of R1 to R2 changes.
Step 5: Determine the effect on balance. Since the ratio of R1 to R2 is no longer equal to the ratio of R3 to R4, the bridge becomes unbalanced.

Wheatstone Bridge Balance Condition – The balance condition of a Wheatstone bridge occurs when the ratio of resistances in one leg equals the ratio in the other leg, leading to no current flow through the galvanometer.
Effect of Resistance Change – Changing the resistance of one of the resistors (like R2) affects the balance condition, potentially causing the bridge to become unbalanced.