If the value of one of the resistances in a Wheatstone bridge is increased, what

Practice Questions

Q1
If the value of one of the resistances in a Wheatstone bridge is increased, what effect does it have on the balance of the bridge?
  1. It remains balanced
  2. It becomes unbalanced
  3. It depends on the other resistances
  4. It becomes short-circuited

Questions & Step-by-Step Solutions

If the value of one of the resistances in a Wheatstone bridge is increased, what effect does it have on the balance of the bridge?
  • 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 that the bridge is balanced when the ratio of the resistances in one leg equals the ratio in the other leg.
  • Step 4: If you increase the value of one of the resistors, it changes the ratio of resistances in that leg.
  • Step 5: When the ratio changes, it disrupts the balance of the bridge.
  • Step 6: As a result, the galvanometer will show a deflection, indicating that the bridge is now unbalanced.
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