Physics Review Question
Unit:
Electricity and Magnetism
Year:
1994 Question#:
25
Question:
An electron is located 1.0 meter from a +2.0 coulomb charge, as shown in the diagram
below.
The electrostatic force acting on the electron is directed toward point
(1
) A
(2
) B
(3
) C
(4
) D
What is this question really asking?
Explanation by: Ray J.
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Answer 1
Point A
INCORRECT
In order for point A to be correct, the 2.0 coulomb charge would have to be placed
at point C due to the fact that opposite charges attract.
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Answer 2
Point B
INCORRECT
Since opposite charges attract, point B is incorrect. Point B shows that opposite
charges repel which is incorrect.
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Answer 3
Point C
INCORRECT
Due to the fact that opposite charges attract, point C can not be true. Point C would
be true if the 2.0 coulomb charge was at point A.
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Answer 4
Point D
CORRECT
Point D is correct because opposite charges attract.
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What's this question really asking?
It is asking whether or not you know that opposite charges attract.
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