When a system , ΔE is always negative. A) absorbs heat and does work
B) gives off heat and has work done on it
C) absorbs heat and has work done on it
D) gives off heat and does work
E) None of the above is always negative.

B

Explanation:

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

i believe the answer is true.