Ques. What is the principal use or function in mechanics of electricity?

Ans. It is purely that of transmission. It corresponds to ropes, shafts and fluids as a medium of conveying and translating power or work.

Ques. What is work?

Ans. Work is the overcoming of resistance through a certain distance.

As a quantity of water moving from a higher to a lower level will do work, so also will a quantity of electricity falling through a difference of potential.

Ques. How is work measured?

Ans. In foot pounds.

Ques. What is a foot pound?

Ans. The amount of work done in raising a weight of one pound one foot or the equivalent, overcoming a pressure of one pound through a distance of one foot.

Ques. What is the electrical unit of work?