In the diagram below the red dot denotes a positive point charge. Points W, X, Y
ID: 1404775 • Letter: I
Question
In the diagram below the red dot denotes a positive point charge. Points W, X, Y, and Z and the point charge lie in the same plane. Points W and Y are equidistant from the charge, as are points X and Z. A particle with charge +qe travels from W to X to Z along the path shown. Which of the following answers is correct?
The net work done by the electric field is zero.
b. The net work done by the electric field is negative.
c. The magnitude of the work done by the electric field from W to X is less than the work done by the electric field from X to Z.
d. No work is done from W to X, because the particle moves along a straight line.
e. The net work done by the electric field is positive.
a.The net work done by the electric field is zero.
b. The net work done by the electric field is negative.
Explanation / Answer
Here ,
as the charge is moving away from the positive charge ,
the work done by electric force is non zero
as the displacement of charge is in same direction as the electric force .
the work done is positive.
work done in moving charge along X to Z is zero , as points are
equidistant from the positive charge
Hence,
the correct option is
e) the net work done by electric field is positive