Q.1.
Relative permeability of vacuum is
Q.2.
The initial rate of rise of current through a coil of inductanceH when suddenly connected to a D.C. supply ofV is ___________Vs
Q.3.
Those magnetic materials are best suited for making armature and transformer cores which have ________permeability and _________hysteresis loss.
Q.4.
While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?
Q.5.
Those materials are well suited for making permanent magnets which have ________ retentivity and ________ coercivity.
Q.6.
Laminated cores, in electrical machines, are used to reduce
Q.7.
The unit of magnetic flux is
Q.8.
Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it