WorksheetsDielectric Materials
Total questions: 10
Worksheet time: 7mins
Dielectrics are
Conducting materials
semi conducting materials
super conducting materials
insulating materials
The dielectric material is
copper
aluminium
silicon
mica
Polarisation is
dipole moment per unit volume
dipole moment per unit mass
dipole moment per unit area
none of the above
The orientational polarisability is
directly proportional to temperature
inversely proportional to temperature
independent of temperature
none of the above
The common feature between ionic and electronic polarisation is
both are caused by electronic displacement
both are strongly dependent on temperature
both are unaffected by variation in temperature of the dielectric
both are responsible for infrared absorption of a dielectric
The orientational polarisation
is independent of temperature
decrease with increase of temperature
increase with increase of temperature
is dependent of temperature
Clausius - Mosotti relation does not hold for
Liquids
Gases
Amorphous solids
crystalline solids
At low frequencies , the following contributes to total polarisability
electronic
ionic
orientational
all the above
The direction of the polarisation
in the direction of the Electric field
in the opposite direction of the Electric field
in the direction of dipole moment
in the direction of displacement
The field due to polarisation of charges on the surface of the spherical cavity of a dielectric is
P / 3ε0
P / 3ε
P / ε0
P / 3εr
