In the figure at the right are shown two settings of positive and negative charges. The setting on the left has two positive charges; the setting on the
right has one negative charge and one positive charge. Each of the charges has the same magnitude.
(i) In each setting, two positions are labeled. If a test charge were to measure the field at each position, rank the magnitude of the electric force the
charge would measure at the four places from highest (rank 1) to lowest.
A
B
C
D
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(ii) If any of the charges feel 0 force, indicate it here:
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(iii) If a test charge of magnitude twice as large as the original test charge were placed at point A, how would the force it feels compare to the force felt
by the original test charge when it was placed at point A?
O same
O twice as big
O half as big
O something else
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(iv) How would the electric field measured at point A by the test charge in (iii) compare to the electric field measured at point A by the test charge in (i)?
O same
O twice as big
O half as big
O something else
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(v) For the test charge in (i) placed at point C, indicate which of the directions in the compass rose at the left best represents the direction of the electric force felt by the charge. () points out
of the page, K points into the page.)
Direction:
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