  We show that the magnetic moment of a composite multiferroic torsional
oscillator can be switched by the electric field. The 180$^o$ switching arises
from the spin-rotation coupling and is not prohibited by the different symmetry
of the magnetic moment and the electric field as in the case of a stationary
magnet. Analytical equations describing the system have been derived and
investigated numerically. Phase diagrams showing the range of parameters
required for the switching have been obtained.
