If the resistance of one of the resistors in a Wheatstone bridge is changed, wha

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Question: If the resistance of one of the resistors in a Wheatstone bridge is changed, what will happen to the balance condition?

Options:

Correct Answer: It will become unbalanced.

Solution:

Changing the resistance of one of the resistors will alter the ratio, thus making the bridge unbalanced.

If the resistance of one of the resistors in a Wheatstone bridge is changed, what will happen to the balance condition?

If the resistance of one of the resistors in a Wheatstone bridge is changed, what will happen to 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 arranged in a diamond shape, with a voltage source and a galvanometer.
Step 3: Know the balance condition. The bridge is balanced when the ratio of the resistances in one leg equals the ratio in the other leg.
Step 4: Recognize what happens when you change one resistor. Changing the resistance of one of the resistors will change the ratio of resistances in that leg.
Step 5: Conclude the effect of the change. Since the ratio is altered, the balance condition is disrupted, making the bridge unbalanced.

Wheatstone Bridge Balance Condition – The balance condition of a Wheatstone bridge occurs when the ratio of the resistances in one leg equals the ratio in the other leg, resulting in zero voltage across the galvanometer.
Effect of Resistance Change – Changing the resistance of one of the resistors alters the ratio of resistances, which disrupts the balance condition and causes a current to flow through the galvanometer.