Using the rules for scientific figures, what do you get when you multiply 67.6 by 1.2a)8b)81c)81.1d)81.12

C

Explanation:

67.6×1.2=81.12

The correct choice would be the answer with the same number of significant figures as the least precise number hence the answer.

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