You can also read this article online as part of the Article Series: What’s the Difference Between Watts, RMS and More. Both watts (W) and volt-amperes (VA) are units of measurement for electrical ...

For more than a century, scientists have relied on separate tools to measure the three core building blocks of electricity: ...

Measuring a voltage is pretty easy: just place your multimeter’s probes across the relevant pins and read the value. Probing currents is a bit trickier, since you need to open up the circuit and place ...