In a Wheatstone bridge, if one of the resistors is changed, how does it affect t

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Question: In a Wheatstone bridge, if one of the resistors is changed, how does it affect the balance condition?

Options:

Correct Answer: It can either balance or unbalance the bridge

Solution:

Changing one resistor can either balance or unbalance the bridge depending on the new value relative to the others.

In a Wheatstone bridge, if one of the resistors is changed, how does it affect the balance condition?

In a Wheatstone bridge, if one of the resistors is changed, how does it affect the balance condition?

Correct Answer: Changing one resistor can either balance or unbalance the bridge depending on the new value relative to the others.

Step 1: Understand that a Wheatstone bridge has four resistors arranged in a diamond shape.
Step 2: Know that the bridge is balanced when the ratio of the two resistors on one side is equal to the ratio of the two resistors on the other side.
Step 3: Identify the resistors in the bridge as R1, R2, R3, and R4.
Step 4: The balance condition is given by the formula: R1/R2 = R3/R4.
Step 5: If you change one resistor (let's say R1), you need to check how this new value compares to the other resistors.
Step 6: If the new value of R1 keeps the ratio R1/R2 equal to R3/R4, the bridge remains balanced.
Step 7: If the new value of R1 changes the ratio, the bridge becomes unbalanced.

Wheatstone Bridge Balance Condition – The balance condition of a Wheatstone bridge is determined by the ratio of the resistances in the two branches. Changing one resistor affects this ratio and can lead to either a balanced or unbalanced state.