Measurement of voltage, current and resistance

Competency Group: Electrical Engineering

Type: Design, Modeling and prototyping Hardware

Description: Measurement of voltage, current and resistance is a very inexpensive and essential part of equipment for household voltages and currents. When voltages and currents increase test methods can become difficult. E.g. Probes are used to measure Voltage Current and Resistance around a circuit and displayed generally on a digital readout.

Citation for Description: Described by authors

Units: Volts — Amps and Ohms

Advantages: Completely necessary for any electrical diagnostics — generally very cheap.

Limitations: Some devices have a time delay associated with them that can lead to false positives/negatives — also some machines have very little tolerance, and bad contacts give bad results.

Regulations: IEEE Standards Organization. (2012). Retrieved from

Target Audience: Engineering

Relevant to Universal Design: No

Stages and Steps: 2.2, 5, 6

Free Resource: Bird, J. (2003). Electrical and Electronic Principles and Technologies. Burlington, MA: Elsevier Science.

Free Resource: Calculatoredge. (n.d.). Ohm's Law Calculator. Retrieved from's-law-calc.htm