WorksheetsTHIN FILM TECHNOLOGY UNIT IV CIA 3
Total questions: 25
Worksheet time: 50mins
According to the Stressed Oil Volume theory, the breakdown strength is
Directly proportional to the stressed oil volume
Directly proportional to the square of the stressed oil volume
Inversely proportional to the stressed oil volume
Inversely proportional to the square of the stressed oil volume
In Breakdown tests, the tests voltages required for these tests are usually of the order of
0 – 10 kV
20 – 50 kV
50 – 100 kV
100-10 mV
High temperature hydrocarbons have
Higher boiling point and low viscosity
Lower boiling point and high viscosity
Lower boiling point and low viscosity
Higher boiling point and high viscosity
Electrical conductivity of insulators is the range _____________.
10-10(Ω-mm)-1
10-10(Ω-cm)-1
10-10(Ω-m)-1
10-8(Ω-m)-1
Units for electric field strength
A/cm2
mho/meter
cm2/V.s
V/cm
Energy band gap size for semiconductors is in the range ________ eV.
1-2
2-3
3-4
> 4
In Bragg’s equation [nλ = 2.d.sinθ], θ is the angle between:
specimen surface and incident rays
normal to specimen surface and incident rays
parallel lattice surfaces d distance apart and incident rays
normal to parallel lattice surfaces d distance apart and incident rays
X-ray diffractometers are not used to identify the physical properties of which of the following?
Metals
Liquids
Polymeric materials
Solids
Which of the following is the most common instrument for photographic recording of diffraction patterns?
Debye-Scherrer powder camera
Gamma camera
Geiger tube
Scintillation counter
In Diffractometer, the identification of a component of the sample from its powder diffraction pattern is based upon the _________ of lines and their relative ___________
Number, length
Number, intensity
Position, length
Position, intensity
In Diffractometers, line intensities depend on ______ and kind of atomic reflection centres in each set of plates.
Number
Position
Length
Distance between li
Multimeter can be used as an ammeter by ________
connecting series resistances
making use of a transducer
making use of a transformer
connecting shunts
What is the wavelength range for UV spectrum of light?
400 nm – 700 nm
700 nm to 1 mm
0.01 nm to 10 nm
10 nm to 400 nm
In which of the following ways, absorption is related to transmittance?
Absorption is the logarithm of transmittance
Absorption is the reciprocal of transmittance
Absorption is the negative logarithm of transmittance
Absorption is a multiple of transmittance
Beer Lambert’s law gives the relation between which of the following?
Reflected radiation and concentration
Scattered radiation and concentration
Energy absorption and concentration
Energy absorption and reflected radiation
Which of the following is not true about Absorption spectroscopy?
It involves transmission
Scattering is kept minimum
Reflection is kept maximum
Intensity of radiation leaving the substance is an indication of concentration
Transmittance is given as T = P/Po. If Po is the power incident on the sample, what does P represent?
Radiant power transmitted by the sample
Radiant power absorbed by the sample
Sum of powers absorbed and scattered
Sum of powers transmitted and reflected
The process of breakdown is accelerated by the presence of ____________
Impurities
Conduction
Humidity
Magnetic Field
The most common mode of breakdown in ceramic insulators is _____________
Defect Breakdown
Thermal Breakdown
Intrinsic Breakdown
Electrochemical Breakdown
Using the powder method of diffractometers, which of the following can be determined?
Percentage of K+
Percentage of Na+ and Cl-
Percentage of KBr and NaCl
Percentage of B
Flow of electrons is affected by the following
Thermal vibrations
Impurity atoms
Crystal defects
all
With the help of which of the following equations is the distance calculated from a known wavelength of the source and measured angle?
Coolidge equation
Bragg’s equation
Debye equation
Scherrer equation
Diffractometers are similar to which of the following?
Optical grating spectrometer
Prism spectrometer
Photo multiplier
Photovoltaic cell
Basic circuit of multimeter consists ________
of a.c. amplifier
of d.c. amplifier
operational amplifier
power amplifier
Which of the following comparison is correct for solvent shift on the n –>π* transition of acetone?
H20 = CH30H = C2H50H = CHC13 = C6H14
H20 > CH30H > C2H50H > CHC13 > C6H14
H20 < CH30H < C2H50H < CHC13 < C6H14
H20 > CH30H < C2H50H < CHC13 < C6H14
