Electrostatics Question 235
Question: Two identical thin rings each of radius R meters are coaxially placed at a distance R meters apart. If Q1 coulomb and Q2 coulomb are respectively the charges uniformly spread on the two rings, the work done in moving a charge qfrom the centre of one ring to that of other is [MP PMT 1999; AMU (Engg.) 1999]
Options:
A) Zero
B)
C)
D)
Show Answer
Answer:
Correct Answer: B
Solution:
where
and
therefore
So,
