If the resistance values in a Wheatstone bridge are all equal, what can be said about the bridge?
Correct Answer: The bridge is balanced.
- 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: Recognize that if all resistance values are equal, then R1 = R2 = R3 = R4.
- Step 4: In a balanced Wheatstone bridge, the ratio of the resistances in one leg is equal to the ratio in the other leg. This means R1/R2 = R3/R4.
- Step 5: Since all resistances are equal, the ratios are equal (1 = 1), which means the bridge is balanced.
- Step 6: When the bridge is balanced, there is no potential difference across the galvanometer, resulting in zero current flowing through it.
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