In a Wheatstone bridge, if the galvanometer shows a deflection, what does it indicate?
Correct Answer: Bridge is unbalanced.
- 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 a galvanometer is an instrument used to detect and measure small electric currents.
- Step 3: When the Wheatstone bridge is balanced, the current through the galvanometer is zero, and it shows no deflection.
- Step 4: If the galvanometer shows a deflection, it means there is a current flowing through it.
- Step 5: A current flowing through the galvanometer indicates that the two legs of the bridge are not balanced.
- Step 6: The unbalance means that the ratios of the resistances in the two legs of the bridge are not equal.
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