What is the operating voltage of most magnetic control systems?

When stepping the voltage down from 480 volts, the two primaries are wired in parallel to double the effective turn ratio. 

In an 8-pin relay, pins 2 and 7 are _____.

Eddy current losses are generally prevented using a solid core material.

Relays and Contactors are electronic switches.

The molar concentration of H+ ions in a solution is 5.8 × 10−9. The pH is _____ .

One Avogadro’s number of iron (Fe) atoms would weigh _____ .

How many electrons are in the outer shell of element 15?

The maximum number of electrons that can occupy a 4p orbital is _____ .

Using whole numbers, determine the molecular weight of calcium hydroxide, Ca(OH)2.