Use the following figure to answer the next problem: Two equal positive charges are placed x m apart.The equipotential lines are at 100 V interval.
-The work required to move a third charge,q =  e,from the  100 V line to b is
A)  100 eV
B)  100 eV
C)  200 eV
D)  200 eV
E)zero

Question

Use the following figure to answer the next  problem:  Two equal positive charges are placed x m apart.The equipotential lines are at 100 V interval.
-The work required to move a third charge,q =  e,from the  100 V line to b is
A)  100 eV 
B)  100 eV 
C)  200 eV 
D)  200 eV 
E)zero

Quizplus · Accepted Answer

The work required to move a charge in an electric field depends on the potential difference between the initial and final points. If the initial and final points have the same potential (in this case, both are on the 100 V line), no work is required, hence the answer is zero.

Use the Following Figure to Answer the Next Problem