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Which of the following statements about a potentiometer is true?

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Question: Which of the following statements about a potentiometer is true?

Options:

  1. It can only measure AC voltages.
  2. It requires a constant current for accurate measurements.
  3. It can measure both AC and DC voltages.
  4. It is only used in laboratory settings.

Correct Answer: It requires a constant current for accurate measurements.

Solution: 

A potentiometer requires a constant current to ensure accurate measurements of voltage.

Which of the following statements about a potentiometer is true?

Practice Questions

Q1
Which of the following statements about a potentiometer is true?
  1. It can only measure AC voltages.
  2. It requires a constant current for accurate measurements.
  3. It can measure both AC and DC voltages.
  4. It is only used in laboratory settings.

Questions & Step-by-Step Solutions

Which of the following statements about a potentiometer is true?
Correct Answer: A potentiometer requires a constant current to ensure accurate measurements of voltage.
  • 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: Learn about current. Current is the flow of electric charge, and it needs to be stable for accurate measurements.
  • Step 3: Realize why constant current is important. If the current changes, the voltage readings can also change, leading to inaccurate measurements.
  • Step 4: Conclude that for a potentiometer to give accurate voltage measurements, it must operate with a constant current.
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