Asalt could be formed by an alkali metal and a(n)
a. halogen.
b. metalloid.
c. transition metal.
d. alkaline-earth metal.

A salt could be formed by an alkali metal and a halogen. The answer is letter A. A halogen is example of nonmetal. The answer is letter A. When compounds containing halogens they are called salts thus the name “salt – former”. Halogen consists of Fluorine, Chlorine, Bromine, Iodine, Astatine.

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