  We study the current magnification effect and associated circulating currents
in mesoscopic systems at equilibrium. Earlier studies have revealed that in the
presence of transport current(non-equilibrium situation), circulating currents
can flow in a ring even in the absence of magnetic field. This was attributed
to current magnification which is quantum mechanical in origin. We have shown
that the same effect can be obtained in equilibrium systems, however, in the
presence of magnetic flux. For this we have considered an one-dimensional open
mesoscopic ring connected to a bubble, and the system is in contact with a
single reservoir. We have considered a special case where bubble does not
enclose magnetic flux, yet circulating currents can flow in it due to current
magnification.
