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If the internal resistance of a cell is negligible, how does it affect the accur

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Question: If the internal resistance of a cell is negligible, how does it affect the accuracy of a potentiometer measurement?

Options:

  1. It increases accuracy
  2. It decreases accuracy
  3. It has no effect
  4. It makes the measurement impossible

Correct Answer: It increases accuracy

Solution: 

If the internal resistance of a cell is negligible, it increases the accuracy of the potentiometer measurement as it does not affect the voltage being measured.

If the internal resistance of a cell is negligible, how does it affect the accur

Practice Questions

Q1
If the internal resistance of a cell is negligible, how does it affect the accuracy of a potentiometer measurement?
  1. It increases accuracy
  2. It decreases accuracy
  3. It has no effect
  4. It makes the measurement impossible

Questions & Step-by-Step Solutions

If the internal resistance of a cell is negligible, how does it affect the accuracy of a potentiometer measurement?
Correct Answer: It increases the accuracy of the potentiometer measurement.
  • Step 1: Understand what a potentiometer is. A potentiometer is a device used to measure voltage by comparing it to a known reference voltage.
  • Step 2: Know what internal resistance means. Internal resistance is the resistance within a cell (battery) that can affect the voltage it provides.
  • Step 3: Recognize that negligible internal resistance means the cell behaves almost like an ideal voltage source, providing a stable voltage.
  • Step 4: Realize that if the internal resistance is negligible, the voltage from the cell remains constant and does not drop when current flows.
  • Step 5: Conclude that with a stable voltage from the cell, the potentiometer can measure the voltage more accurately without interference from the cell's internal resistance.
  • Internal Resistance – The internal resistance of a cell can affect the voltage output and measurement accuracy in electrical circuits.
  • Potentiometer – A potentiometer is an instrument used to measure the voltage of a circuit without drawing current, thus providing accurate measurements.
  • Measurement Accuracy – Accuracy in measurements can be influenced by factors such as internal resistance, which can lead to voltage drops and errors.
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