Two point charges,separated by 1.7 cm,have charge values of +2.0 and −4.0 µC,respectively.Suppose we determine that 50 field lines radiate out from the +2.0-µC charge.If so,what might be inferred about the −4.0-μC charge with respect to field lines?
A)25 radiate out
B)100 radiate out
C)100 radiate in
D)50 radiate in
E)50 radiate out

Question

Two point charges,separated by 1.7 cm,have charge values of +2.0 and −4.0 µC,respectively.Suppose we determine that 50 field lines radiate out from the +2.0-µC charge.If so,what might be inferred about the −4.0-μC charge with respect to field lines?​
A)25 radiate out
B)100 radiate out
C)100 radiate in
D)50 radiate in
E)50 radiate out

Quizplus · Accepted Answer

Electric field lines originate from positive charges and terminate on negative charges. Since the negative charge is twice the magnitude of the positive charge, it will have twice the number of field lines terminating on it compared to those originating from the positive charge. Therefore, if 50 field lines radiate out from the +2.0-µC charge, 100 field lines will terminate on the -4.0-µC charge, indicating 100 field lines radiate in towards the negative charge.

Two Point Charges,separated by 1