Suppose you want to do an experiment to hear how three different objects with sound when dropped from the same distance. you drop a pebble, a rock, and a grain of sand. what are the variables of your experiment?

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