Q.1
Which of the following are true for relative dielectric constant?
1. It is dimensionless.
2. It is equal to 1 for vacuum.
3. It is equal to 1 for all substances.
Q.2
In an intrinsic semiconductor, at a given temperature T
Q.3
Spontaneous magnetisation is characteristic of ferromagnetic materials.
Q.4
Schrodinger wave equation is a
Q.5
Debye temperature of metals is
Q.6
Electric dipole moment is expressed in debye unit.
Q.7
The unit for mmf is
Q.8
The fact that domains exhibits spontaneous magnetisation is
Q.9
The number of protons in a silicon atom are
Q.10
The resistance of a photoconductor
Q.11
At room temperature the number of conducting electrons in an intrinsic semiconductor
Q.12
In solid insulator materials having only one kind of atom, the types of polarization which exist are
Q.13
Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.
Q.14
A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.
Q.15
Many compounds also exhibit semiconducting properties.
Q.16
The dielectric losses do not depend on frequency.
Q.17
A characteristic property of crystal is its periodicity of structure.
Q.18
A vacant electronic state moves in the same direction as would a positive charge carrier.
Q.19
An atom of a rare gas is placed is an electric field E. Then
Q.20
Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called
0 h : 0 m : 1 s