Some household appliances have plugs with two prongs while others have three prongs. The additional prong is
A) for direct current.
B) for 120-Hz voltage.
C) to connect to ground.
D) for additional mechanical strength.
E) for 240-Hz voltage.

Question

Quizplus · Accepted Answer

The additional prong on a plug is for grounding, which helps prevent electrical shocks and fires by directing any extra electricity into the ground.

Some Household Appliances Have Plugs with Two Prongs While Others