Is elephant toothpaste a chemical reaction? 1.Did the reaction give off or take heat?
2.Is there a color change?
3. Is there any smell?
4.were any gases released?
5. Can the change be undone?

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

imma come back to you hold on

0.88m hope i am correct : )