The small negative ion generators that are sold in appliance stores as a way to "improve your health" create negative ions in the air by transferring negative charge from a metal surface to passing air molecules. They generally use a number of sharp metal whiskers rather than a smooth metal ball to transfer the charge to the air because negative charges
A)	placed on sharp points repel one another more strongly than those placed on smooth surfaces.
B)	flow best through wires and the metal whiskers are essentially wires.
C)	the whiskers can touch one another to form complete circuits and charge only flows when there is a complete circuit present.
D)	cannot accumulate on a metal ball without repelling one another.
Answer:A
The small negative ion generators that are sold in appliance stores as a way to "improve your health" create negative ions in the air by transferring negative charge from a metal surface to passing air molecules. They generally use a number of sharp metal whiskers rather than a smooth metal ball to transfer the charge to the air because negative charges
A)	placed on sharp points repel one another more strongly than those placed on smooth surfaces. B)	flow best through wires and the metal whiskers are essentially wires. C)	the whiskers can touch one another to form complete circuits and charge only flows when there is a complete circuit present. D)	cannot accumulate on a metal ball without repelling one another.