Related Questions

Heating of ferromagnetic materials to a temperature above Curie temperature makes it
A Insulator for heat & electricity transmission
B Ferritic
C Behave like paramagnetic materials
D Superconductor
The relative permeability of a ferromagnetic material is
A Less than one
B More than one
C More than 10
D More than 100 or 1000
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
In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the
A Ostwald chart
B Cox chart
C Sankey diagram
D None of these
In low or standard frequency induction furnace, heat is produced by the
A Combination of induced current and skin effect
B Induction and resistance
C Current flow through a heating element
D None of these
In an electric room heat convector the method of heating used is Resistance heating
A True
B False

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