The unit of magnetic flux is? Mark as favorite Copy Link henry weber ampere-turn/weber ampere/metre Check Answer
The initial rate of rise of current through a coil of inductance 1O H when suddenly connected to a D.C. supply of 200 V is ……….. A/s? Mark as favorite Copy Link 60 20 0.05 600 Check Answer
The transformer cores operating at microwave frequency range, are usually made of? Mark as favorite Copy Link carbon copper silicon steels ferrites Check Answer
Permanent magnets are normally made of? Mark as favorite Copy Link alnico alloys aluminium cast iron wrought iron Check Answer
If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be? Mark as favorite Copy Link zero small large none of the above Check Answer
Those magnetic materials are best suited for making armature and transformer cores which have .. . . . . permeability and ……… hystersis loss? Mark as favorite Copy Link high, high low, high high, low low, low Check Answer
The unit of retentivity is? Mark as favorite Copy Link weber weber/sq. m ampere turn/metre ampere turn Check Answer
The relative permeability of a ferromagnetic material is? Mark as favorite Copy Link less than one more than one more than 10 more than 100 or 1000 Check Answer
A material for good magnetic memory should have? Mark as favorite Copy Link low hysteresis loss high permeability low retentivity high retentivity Check Answer
In a magnetic material hysteresis loss takes place primarily due to? Mark as favorite Copy Link rapid reversals of its magnetisation flux density lagging behind magnetising force molecular friction it high retentivity Check Answer