An air gap is usually inserted in magnetic circuits to

The relative permeability of a ferromagnetic material is

The unit of magnetic flux is

Permeability in a magnetic circuit corresponds to______ in an electric circuit.

Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it

Relative permeability of vacuum is

Permanent magnets are normally made of

Energy stored by a coil is doubled when its current is increased by percent.

Those magnetic materials are best suited for making armature and transformer cores which have____permeability and_______hystersis loss.

The rate of rise of current through an inductive coil is maximum

When both the inductance and resistance of a coil are doubled the value of

The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is_______Vs

A material for good magnetic memory should have

Conductivity is analogous to

In a magnetic material hysteresis loss takes place primarily due to

Those materials are well suited for making permanent magnets which have _____ retentivity and _______ coercivity.

If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be

Hard steel is suitable for making permanent magnets because

Silicon steel is used in electrical machines because it has

Conductance is analogous to

The property of a material which opposes the creation of magnetic flux in it is known as

The unit of retentivity is

Reciprocal of reluctance is

While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit ?

The unit of reluctance is

A ferrite core has less eddy current loss than an iron core because

Hysteresis loss least depends on

Laminated cores, in electrical machines, are used to reduce