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In a potentiometer experiment, if the known voltage is increased, what effect do

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Question: In a potentiometer experiment, if the known voltage is increased, what effect does it have on the balance point?

Options:

  1. Balance point moves towards the positive terminal
  2. Balance point moves towards the negative terminal
  3. Balance point remains unchanged
  4. Balance point becomes unstable

Correct Answer: Balance point moves towards the positive terminal

Solution: 

Increasing the known voltage will cause the balance point to move towards the positive terminal, as a higher voltage requires a longer length of wire to achieve balance.

In a potentiometer experiment, if the known voltage is increased, what effect do

Practice Questions

Q1
In a potentiometer experiment, if the known voltage is increased, what effect does it have on the balance point?
  1. Balance point moves towards the positive terminal
  2. Balance point moves towards the negative terminal
  3. Balance point remains unchanged
  4. Balance point becomes unstable

Questions & Step-by-Step Solutions

In a potentiometer experiment, if the known voltage is increased, what effect does it have on the balance point?
Correct Answer: Balance point moves towards the positive terminal.
  • Step 1: Understand that a potentiometer is used to measure voltage by balancing it against a known voltage.
  • Step 2: Recognize that the balance point is where the voltage across a certain length of wire equals the known voltage.
  • Step 3: When the known voltage is increased, it means we need more voltage to reach balance.
  • Step 4: Since the potentiometer wire has a uniform resistance, a higher voltage requires a longer length of wire to achieve the same voltage drop.
  • Step 5: Therefore, the balance point will move towards the positive terminal of the known voltage source, indicating that more wire length is needed.
  • Potentiometer Principle – The balance point in a potentiometer is determined by the ratio of the known voltage to the length of the wire, where an increase in voltage requires a longer length to achieve balance.
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