Question

A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw based on this description?

-The electric field points to the left because the force on a negative charge is opposite to the direction of the field.
-The electric field points to the right because the force on a negative charge is in the same direction as the field.
-No conclusion can be drawn because the sign of the charge creating the field is unknown.
-No conclusion can be drawn because the amount of charge on the test charge is unknown.

Answer 1

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The best conclusion to draw based on the description is:

• - The electric field points to the left because the force on a negative charge is opposite to the direction of the field.

The force experienced by a negative test charge is in the opposite direction of the electric field. Since the force is directed to the right, the electric field must be pointing to the left. This conclusion holds true regardless of the sign or amount of charge on the test charge or the charge creating the field.

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