In the formula NH4+2(aq) + SO42-4 NH3(aq) +HSO4-4(aq) which is the acid and which is the strongest base

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

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.