AP EAMCET202023 Sep 2020Morning ShiftPhysicsElectrostaticsActual
As shown in the figure below, a point charge q moves from point P to a point S traversing a path P Q R S in a uniform E → . The electric field is directed along a direction parallel to x -axis. The coordinates of, P , Q , R and S are a , b , 0 2 a , 0 , 0 a , - b , 0 and 0 , 0 , 0 respectively. What is the work done by the field in the process?
Options
- Aq E a
- B- q E a
- C0
- Dq E b
Correct answer
B. - q E a
Step-by-step solution
Electric force F = q E → = q E   i ^ displacement p s → = - a i ^ - b j ^ Work done is given by W = F → . S → ⇒ W = q E i ^ . - a i ^ - b j ^ = - q E a