# Comment on "Resistance of a digital voltmeter: teaching creative thinking through an inquiry-based lab"

## TL;DR

This paper discusses the importance of teaching measurement concepts in physics education, focusing on digital multimeter input impedance analysis as a practical example, and suggests improvements for its educational use.

## Contribution

It provides a critical commentary on previous work, emphasizing the need for more comprehensive discussion on digital multimeter input impedance in physics teaching.

## Key findings

- Highlights the educational value of digital multimeter impedance analysis
- Suggests enhancements for teaching methods involving multimeter measurements
- Emphasizes the importance of understanding instrument non-idealities in physics education

## Abstract

Teaching about measurements and showing examples of instruments' non-ideal behaviour are important in physics education. Digital multimeter input impedance analysis is perfect for this, since these instruments are easily available, precise enough, have good value/price ratio and represent modern technology. A recent paper (2018 Phys. Educ. 53 053005) demonstrates how the investigation of the input impedance of a digital multimeter can be used in education. However, we think that some more discussion is needed to make it more complete.

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Source: https://tomesphere.com/paper/1906.09397