Home NCERT Solutions NCERT Exemplar CBSE Sample Papers NCERT Books Class 12 Class 10
Question 12

A charge of 8 mC is located at the origin. Calculate the work done in taking a small charge of -2 x 10-9 C from a point P (0, 0, 3 cm) to a point Q (0, 4 cm, 0), via a point R (0, 6 cm, 9 cm).


Charge located at the origin, q = 8 mC= 8 × 10 - 3 C

Magnitude of a small charge, which is taken from a point P to point R to point Q, q1 = - 2 × 10 - 9 C

All the points are represented in the given figure.


Point P is at a distance, d1 = 3 cm, from the origin along z-axis.

Point Q is at a distance, d2 = 4 cm, from the origin along y-axis.

Potential at point P,   

Potential at point Q,

Work done (W) by the electrostatic force is independent of the path.

Therefore, work done during the process is 1.27 J.

Popular Questions of Class 12 Physics

Recently Viewed Questions of Class 12 Physics

8 Comment(s) on this Question

Write a Comment: