Recent content by Robbyj

Say we have a box made of two materials (a box with an internal lining) and a lid for the box made of a certain material. If I fill the box with a heated liquid and cover a certain percentage with the lid, is the following calculation correct for heat loss in the liquid if you ignore any film...

If there was no CEMF, such as when starting a DC motor, armature current would be extremely high. In this case, starting resistors can be used to limit the initial current surge.

Back or counter emf opposes the terminal voltage and limits armature current. As long as terminal voltage is greater than the induce CEMF current will flow, which it will be.

Personally, I have never encountered either of these problems, not to say though that it is an impossibility. It would depend mostly on what company you work for.

The amount of stress involved has a lot to do with the companies management, equipment condition, and complexity of the process.