Most Calculators Operate on 6

Multiple Choice

Most calculators operate on 6.0 V.If,instead of using batteries,you obtain 6.0 V from a transformer plugged into 110-V house wiring,what must the ratio of the primary to the secondary turns be in the transformer? (Ignore any changes in voltage due to rectification.)

A) 0.054
B) 18
C) 660
D) 0.066
E) 15