When using a magnet and paper clip where would the magnetic force be the strongest?

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 think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

um i think it might be a car?

i wish i could but this one is weird give me abc and i can solve it.