2) This is a kind of electroscope student made in science class to study charges
Student Procedure:
-Tear off two pieces of tape, each 4 inches (10 cm) long.
-Press each piece firmly on the work table leaving one
end of each tape piece sticking up as a handle.
-Quickly pull the tapes from the table and stick one piece
on the arm of a straw in one film canister, and the other
piece on the arm of a straw in the other
film canister.
--Move the canisters so the two pieces of tape are face to
face, about 6 inches apart.
-Slowly move the canisters closer together.
This experiment illustrates several important facts about forces that
include ALL BUT ONE of those listed here.
A) Like charges repel or exert push.
B) Pushing forces can work at a distance
Like charges exert a pull from a distance.
Eliminate
D) Friction force can cause a transfer of charge.
Аа
W
P
N