The potential energy of particle in a force field is, ,
where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is:
B / 2A
2A / B
A / B
B / A
As we discussed @7996
for equilibrium
for stable equilibrium
should be positive for the value of r
is positive value for
Option 1)
B / 2A
This is incorrect option
Option 2)
2A / B
This is correct option
Option 3)
A / B
This is incorrect option
Option 4)
B / A
This is incorrect option