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Which of the following statements about a potentiometer is true?
Which of the following statements about a potentiometer is true?
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Practice Questions
1 question
Q1
Which of the following statements about a potentiometer is true?
It can only measure AC voltages.
It requires a constant current for accurate measurements.
It can measure both AC and DC voltages.
It is only used in laboratory settings.
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A potentiometer requires a constant current to ensure accurate measurements of voltage.
Questions & Step-by-step Solutions
1 item
Q
Q: Which of the following statements about a potentiometer is true?
Solution:
A potentiometer requires a constant current to ensure accurate measurements of voltage.
Steps: 4
Show Steps
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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