Question

31. Point charge q moves from point P to point S
along the path PQRS in a uniform electric
field E pointing parallel to the positive
direction of the x-axis. The coordinates of the
points P, Q, R and S are (a, b, 0), (2a, 0, 0),
(a, b, 0) and (0, 0, 0) respectively. The work
done by the field in the above process is given
by the expression.
P
SL
R
2) -qEa
1) Ea
3) EaV2
2
4) EV (2a)2 + b​

Answer 1

Answer:Work done  

E

 is independent of path.

W PQRS  =W  PS =q[E  x   d  x +E  y  d  y  +E  z  d  z ]=q[E(−a)+0+0]=−qEa

Explanation:

Negative sign here shows that work has been done against field.