NEW
Font size
S
M
L
XL
WorksheetsElectron Spin Resonance
Total questions: 35
Worksheet time: 18mins
Name
Class
Date
1.
What is the another name of Electron Spin Resonance(ESR)?
a)
Electron Paramagnetic Response
b)
Electron Proton Resonance
c)
Electron Paramagnetic Reoccurance
d)
Electron Paramagnetic Resonance
2.
The spin and charge of the electron confer on it a spin magnetic moment μs is given by?
a)
(-gμBs)
b)
(+gμBs)
c)
(-gμEs)
d)
(+gμEs)
3.
What is μB?
a)
Bohr Magneton
b)
Bohr Magnetic Field
c)
Bohr Moment
d)
Bohr Magnetic Moment
4.
Spectrometer that operates around 9.5GHzare often referred to as.
a)
P-Band Spectrometer
b)
Q-Band Spectrometer
c)
X-Band Spectrometer
d)
Y-Band Spectrometer
5.
The frequency 9530MHz falls under which region?
a)
UV
b)
X-Ray
c)
Microwave
d)
Raman
6.
Spectrometer operates around 35GHzare often referred to as.
a)
P-Band Spectrometer
b)
Q-Band Spectrometer
c)
X-Band Spectrometer
d)
Y-Band Spectrometer
7.
In electromagnetic radiations, the electric field, the magnetic field & the direction of propagation are mutually
a)
Parallel
b)
Aligned
c)
Inclined
d)
Perpendicular
8.
In ESR experiment the magnetic component of the electromagnetic radiation that interacts with the magnetic dipole associates with which type of electron?
a)
Paired Electron
b)
Unpaired Electron
c)
Two Paired Electrons
d)
Two Unpaired Electrons
9.
the source of radiation in X-Band Spectrometer is
a)
Ruby crystal oscillator
b)
RF oscillator
c)
Klystron oscillator
d)
piezoelectric oscillator
10.
How many arms are present in X-Band Spectrometer instrument?
a)
4
b)
6
c)
2
d)
1
11.
At what place the sample is placed in X-Band Spectrometer?
a)
Crystal Detector in fourth arm
b)
Source in the first arm
c)
Dummy Load in third arm
d)
rectangular microwave Cavity in the second arm
12.
The dummy load and semiconducting crystal are placed in which arms of the bridge?
a)
3,4 respectively
b)
1,2 respectively
c)
1,4 respectively
d)
2,4 respectively
13.
The radiation that arrived in the fourth arm are detected by
a)
Crystal detector
b)
Oscillator
c)
Radiation Detector
d)
Amplifier
14.
When the bridge is in a balanced position, microwave power flows only in the two arms what are they?
a)
Crystal Detector & Klystron
b)
Klystron & Dummy Load
c)
Cavity & Dummy Load
d)
Cavity & Klystron
15.
The width of the ESR lines are fairly.
a)
Large
b)
Small
c)
Moderate
d)
Very Large
16.
In ESR the spectrum usually recorded in which mode
a)
Integrate Mode
b)
Derivative Mode
c)
Differentiation Mode
d)
Multiply Mode
17.
The ESR spectrum is obtained by plotting
a)
Intensity Vs Frequency
b)
Intensity Vs Wavelength
c)
Intensity Vs Strength of Magnetic Field
d)
Wavelength Vs Strength of Magnetic Field
18.
The total area covered by either the absorption (or) derivative curve is proportional to the number of ___________________in the sample
a)
Paired Electron
b)
Unpaired Electron
c)
Two Paired Electrons
d)
Two Electrons
19.
In ESR the kinetic energy term is due to the motion of.
a)
Electrons
b)
Protons
c)
Neutrons
d)
Nucleus
20.
The selection rules for ESR transitions are
a)
Δms=±1 & Δml=0
b)
Δms=±2 & Δml=0
c)
Δml=±1 & Δms=0
d)
Δms=0 & Δml=0
21.
In ESR esperiment g is a proportionality factor and sometimes it is also called as
a)
Zeeman Factor
b)
Lande's Factor
c)
Stark splitting Factor
d)
Lande's splitting Factor
22.
The value of g is which type of quantity?
a)
Scalar
b)
Tensor
c)
Vector
d)
Scalar & Vector
23.
In some ionic crystals, the value of g vary from.
a)
0.3 to 0.8
b)
0.2 to 0.4
c)
0.2 to 0.8
d)
0.3 to 0.5
24.
The value of gZ is obtained when the magnetic field is aligned____________ to Z-axis
a)
Parallel
b)
Aligned
c)
Perpendicular
d)
Inclined
25.
DPPH is generally used a standard whose g value is
a)
2.0036
b)
2.0306
c)
0.2036
d)
0.632
26.
In the spectrometer standard sample is placed alonng with which sample
a)
Known Sample
b)
Unknown Sample
c)
Klystron Sample
d)
No Sample
27.
Fine Sructure in ESR spectra is due to
a)
Electron Electron Coupling
b)
Electron Resonance Coupling
c)
Electronn Spin Coupling
d)
Electronn Spin Resonance
28.
Nucleus-electron spin coupling is ESR results in
a)
Spin Spin Interaction
b)
Hyperfine structure
c)
Electron Resonance Interaction
d)
Zeeman Interaction
29.
The fundamental equation of EPR spectroscopy
a)
hν=g μBB
b)
ν=gμBB
c)
hν=gμNB
d)
hν=μeB
30.
one of the common mechanisms by which electrons and nuclei interact is and by dipolar interaction
a)
Fermi interaction
b)
Fermi contact interaction
c)
Zeeman interaction
d)
Spin Spin Interaction
31.
For a radical having M equivalent nuclei, each with a spin of I, the number of EPR lines expected
a)
2MI + 1
b)
2I+1
c)
2M+1
d)
2MI+2
32.
In methyl radical the number of ESR lines expected is
a)
2
b)
1
c)
4
d)
3
33.
Electron spin resonance is also known as which of the following?
a)
Electron diamagnetic reoccurrence
b)
Electron paramagnetic reoccurrence
c)
Electron diamagnetic resonance
d)
Electron paramagnetic resonance
34.
The value of the magnetic moment is known as which of the following?
a)
Bohr magneton
b)
Thompson magneton
c)
Goldstein magneton
d)
Rutherford magneton
35.
A free electron is placed in a magnetic field of strength of 1.3 T. the resonance frequency (if g = 2.0023)
a)
36.43 GHz
b)
36.43 MHz
c)
36.43 kHz
d)
63.43 GHz
Reset
