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If a potentiometer is used to compare two cells, what is the effect of increasin

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Question: If a potentiometer is used to compare two cells, what is the effect of increasing the length of the wire?

Options:

  1. It increases the accuracy of the measurement
  2. It decreases the accuracy of the measurement
  3. It has no effect on the measurement
  4. It makes the cells equal

Correct Answer: It increases the accuracy of the measurement

Solution: 

Increasing the length of the wire increases the potential gradient, which can improve the accuracy of the measurement by allowing for finer adjustments.

If a potentiometer is used to compare two cells, what is the effect of increasin

Practice Questions

Q1
If a potentiometer is used to compare two cells, what is the effect of increasing the length of the wire?
  1. It increases the accuracy of the measurement
  2. It decreases the accuracy of the measurement
  3. It has no effect on the measurement
  4. It makes the cells equal

Questions & Step-by-Step Solutions

If a potentiometer is used to compare two cells, what is the effect of increasing the length of the wire?
Correct Answer: Potential gradient badhta hai.
  • Step 1: Understand what a potentiometer is. It is a device used to measure voltage by comparing two different voltage sources (cells).
  • Step 2: Know that the wire in a potentiometer has a certain length and resistance, which affects how voltage is distributed along it.
  • Step 3: Realize that increasing the length of the wire means there is more wire for the voltage to spread out over.
  • Step 4: Understand that a longer wire increases the potential gradient, which is the change in voltage per unit length of the wire.
  • Step 5: A higher potential gradient means that small changes in position along the wire correspond to larger changes in voltage.
  • Step 6: This allows for finer adjustments when comparing the two cells, leading to more accurate measurements.
  • Potential Gradient – The potential gradient is the change in potential per unit length of the wire, which affects the sensitivity of the potentiometer.
  • Accuracy in Measurement – Increasing the length of the wire can lead to finer adjustments in the comparison of the two cells, enhancing measurement accuracy.
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