Which is a stronger nucleophile in an sn2 raction, pyridine or pyrole?

Pyridine

Explanation:

Pyridine is a stronger nucleophile than pyrole ,

Since , both have a lone pair of electron on its nitrogen atom , and both the structure are aromatic in nature .

But , in case of pyrole ,  the lone pair on nitrogen participates in the delocalization and makes the ring aromatic in nature . hence the lone pair losses its nuleophilic character .

But , in case of pyridine , the lone are free to act as a nucleophile , since they are not involved in the delocalization of the ring .

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