________ has a lowrelative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable.

Related MCQs

• The cold rolled grain oriented steel has ______ permeability in the direction of the grain orientation.
• The weight of copper of both armature and field windings decreases with _____ in number of poles.
• Hot rolled sheets have ______ value of permeability
• In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made
• In D.C. machines, the ____ in field mmf results in increase in size and cost of machines.
• cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall
• The efficiency of a machine should be as ______ as possible to reduce the operating cost.
• Aluminium when adopted as a conductor material in ______ transformers, decreases the overall cost of the transformer
• Which ofthe following materials is used in the manufacture of resistance grids to be used in the starters of large motors ?
• Dummy coil should not be used in