Many elements that are essential for life, including nitrogen, oxygen, and carbon, are part of what classification? Group of answer choices

noble gases

nonmetals

metalloids

metals

nonmetals

Explanation:

noble gases -

metalliods - where are the other elements?

transition metals - where do you see them?

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current