If the Wheatstone bridge is unbalanced, what can be inferred about the resistances?
Correct Answer: The ratio of the resistances is not equal.
- 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: Know that the Wheatstone bridge has four resistors arranged in a diamond shape.
- Step 3: Recognize that the bridge is considered 'balanced' when the voltage across the middle (between the two legs) is zero.
- Step 4: If the bridge is 'unbalanced', it means that the voltage across the middle is not zero.
- Step 5: Conclude that an unbalanced bridge indicates that the ratio of the resistances in one leg is not equal to the ratio in the other leg.
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