Which location represents a period on a periodic table? a. a vertical row b. a horizontal row c. a diagonal row on the periodic table d. a row on the left and right of the table

Option B: a horizontal row.

In a periodic table, elements are arranged in increasing order of atomic number. There are 18 groups and 7 periods in the periodic table. On moving left to right in a period, group number increases and on moving top to bottom in a group period increases. In periodic table, columns (vertical) represent groups and rows (horizontal) represent periods.

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