Why Potentiometer is Preferred Over Voltmeter?

Answer: This is because a voltmeter needs a small cell current to function correctly. As a result, a voltmeter displays a value lower than the quantity’s initial value.

Therefore, it monitors the terminal potential difference in a closed circuit, which is lower than the cell’s emf. As a result, we can say that the proposition is true. Additionally, the explanation is also a true statement that supports the assertion. As a result, the claim and reason are both valid, and the assertion’s justification is the reason.