I am correcting my electronics test and I had a couple of questions that i cannot find, and I am need of some help.

What is one word to describe "potential difference"?

What is one word to describe "electomotive force"?

What is another name for a condenser?

What are you calculating with this formula and how do I find K? C=(KA)/t?

What are you calculating with this formula and what is C and what is Q? Q=CE?

Any help would be great. Thanks guys