Related Questions

Substances which have permeability less than the permeability of free space are known as
A Ferromagnetic
B Paramagnetic
C Diamagnetic
D Bipolar
In heating the ferromagnetic material by induction heating, heat is produced due to
A Induced current flow through the charge
B Hysteresis loss taking place below Curie temperature
C Due to hysteresis loss as well as eddy current loss taking place in the charge
D None of the above factors
Which of the following is a ferromagnetic material?
A Tungsten
B Aluminium
C Copper
D Nickel
Which of the following is not a ferromagnetic material?
A Nickel
B Cobalt
C Aluminium
D Iron
The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the
A Critical point
B Curie temperature
C Inversion temperature
D Eutectic temperature
Ferromagnetic material owe their properties to __________ inner sub-shells.
A Completely filled
B Partially filled
C Equally filled
D Vacant
Ferromagnetic ceramic material is not used in the
A Thermal insulation
B Transformers
C Magnetic switches
D Television sets
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
A True
B False
Relative permeability of vacuum is
A 1
B 1 H/m
C $$4\pi \times {10^{ - 7}}$$
D $$\frac{1}{4}$$
Superconducting metal in super conducting state has relative permeability of
A Zero
B One
C Negative
D More than one

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