Yes, consumes energy becouse margnetic circute consumes 
current and P=VI, hence it consumes energy

Magnetic circuit consumes energy because of losses only. 
For example take a transformer, which consumes energy even 
secondary is not loaded. Its purely because of its various 
losses indulged.

Magnetic circuit consumes energy not only because of 
losses .  example for no load transformer is quit ok but we 
know motors, which rotate on no load as well as on load . 
to develop flux to creat torque it draws current .