Electrostatics Question 323
Question: Two small spheres each carrying a charge $ q $ are placed $ r $ metre apart. If one of the spheres is taken around the other one in a circular path of radius $ r $ , the work done will be equal to [CPMT 1975, 91, 2001; NCERT 1980, 83; EAMCET 1994; MP PET 1995; MNR 1998; Pb. PMT 2000]
Options:
A) Force between them $ \times r $
B) Force between them $ \times 2\pi r $
C) Force between them $ /2\pi r $
D) Zero
Show Answer
Answer:
Correct Answer: D
Solution:
The force is perpendicular to the displacement.
