Q.1
Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles.
Q.2
When a material is in superconducting state and a magnetic field is applied
Q.3
As the atoms of rare gases become larger, electronic polarizability
Q.4
Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
Q.5
The residual resistivity of a binary alloy at 0 K is
Q.6
Nickel is a non-magnetic material.
Q.7
The number of protons in a copper atom are
Q.8
With increase in temperature, the electrical conductivity would
Q.9
If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.
Q.10
Electrical contact materials used in switches, brushes, relay must possess
Q.11
The merger of hole and free electron is called
Q.12
In van der walls crystals, there exists a high degree of stability of the outer electron shell.
Q.13
On the basis of the type of chemical bonds, solids may be classified into
Q.14
The phenomenon of dielectric hysteresis occurs with
Q.15
When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability.
Q.16
The most important set of specifications of transformer oil include
Q.17
If a small amount of Cu is added to Ni conductor, then
Q.18
The elements which become superconducting at extremely low temperatures are
Q.19
In a metal, the valence electrons
Q.20
Wood is a diamagnetic material.
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