For achieving steady state oscillation, the condition to be satisfied in terms of reflection coefficients is:
a) Гin=ГL
b) Гin=-ГL c) Гin=1/ГL d) None of the mentioned
a) Гin=ГL
b) Гin=-ГL c) Гin=1/ГL d) None of the mentioned
Anonymous Quiz
27%
A
37%
B
24%
C
11%
D
To achieve stable oscillation, Zin + ZL=0 is the only necessary and sufficient condition to be satisfied by the microwave oscillator.
a) True
b) False
a) True
b) False
Anonymous Quiz
67%
A
33%
B
In transistor oscillators, FET and BJT are used. Instability is achieved by:
a) Giving a negative feedback
b) Giving a positive feedback c) Using a tank circuit d) None of the mentioned
a) Giving a negative feedback
b) Giving a positive feedback c) Using a tank circuit d) None of the mentioned
Anonymous Quiz
34%
A
35%
B
28%
C
4%
D
The stability of an oscillator is enhanced with the use of:
a) high Q tuning network
b) passive elements c) appropriate feedback methods d) none of the mentioned
a) high Q tuning network
b) passive elements c) appropriate feedback methods d) none of the mentioned
Anonymous Quiz
38%
A
22%
B
37%
C
3%
D
In oscillator tuning circuits, dielectric resonators are preferred over waveguide resonators because:
a) they have high Q factor
b) compact size c) they are easily integrated with microwave integrated circuits d) all of the mentioned
a) they have high Q factor
b) compact size c) they are easily integrated with microwave integrated circuits d) all of the mentioned
Anonymous Quiz
25%
A
25%
B
23%
C
27%
D
A dielectric resonator coupled with an oscillator operates in:
a) TE10δ
b) TE01δ c) TM10δ d) TM01δ
a) TE10δ
b) TE01δ c) TM10δ d) TM01δ
Anonymous Quiz
37%
A
34%
B
24%
C
5%
D
A dielectric resonator is modeled as __________ when it is used as a tuning circuit with a oscillator.
a) series RLC circuit
b) parallel RLC circuit c) LC circuit d) tank circuit
a) series RLC circuit
b) parallel RLC circuit c) LC circuit d) tank circuit
Anonymous Quiz
32%
A
35%
B
20%
C
13%
D
🥰1
Electronics Engineering All Subject Lecturer Videos pinned «https://youtu.be/SYcOT9l1SKc»
Electronics Engineering All Subject Lecturer Videos
https://youtu.be/SYcOT9l1SKc
Those who want the leave the channel please leave and who want to remain in channel remains I don't want the students who come for 1 day and leave the channel on the next day because if they want become engineer in 1 day then no need to join the channel.
Electronics Engineering All Subject Lecturer Videos pinned «Those who want the leave the channel please leave and who want to remain in channel remains I don't want the students who come for 1 day and leave the channel on the next day because if they want become engineer in 1 day then no need to join the channel.»
What does LED stand for?
A) Light Emitting Display
B) Low Energy Display C) Light Emitting Diode D) Light Emitting Detector
A) Light Emitting Display
B) Low Energy Display C) Light Emitting Diode D) Light Emitting Detector
Anonymous Quiz
12%
A
7%
B
81%
C
0%
D
A device which converts electrical energy in the form of a current into optical energy is called as ___________
a) Optical source
b) Optical coupler c) Optical isolator d) Circulator
a) Optical source
b) Optical coupler c) Optical isolator d) Circulator
Anonymous Quiz
42%
A
37%
B
21%
C
0%
D
The frequency of the absorbed or emitted radiation is related to difference in energy E between the higher energy state E2 and the lower energy state E1. State what h stands for in the given equation?
E = E2 - E1 = hf
E = E2 - E1 = hf
Anonymous Quiz
18%
Gravitation constant
67%
Planck's constant
6%
Permittivity
9%
Attenuation constant
The radiation emission process (emission of a proton at frequency) can occur in __________ ways.
a) Two
b) Three c) Four d) One
a) Two
b) Three c) Four d) One
Anonymous Quiz
40%
A
34%
B
11%
C
14%
D
Which process gives the laser its special properties as an optical source?
a) Dispersion
b) Stimulated absorption c) Spontaneous emission d) Stimulated emission
a) Dispersion
b) Stimulated absorption c) Spontaneous emission d) Stimulated emission
Anonymous Quiz
9%
A
23%
B
29%
C
40%
D
The lower energy level contains more atoms than upper level under the conditions of ________________
a) Isothermal packaging
b) Population inversion c) Thermal equilibrium d) Pumping
a) Isothermal packaging
b) Population inversion c) Thermal equilibrium d) Pumping
Anonymous Quiz
10%
A
29%
B
48%
C
13%
D
__________________ in the laser occurs when photon colliding with an excited atom causes the stimulated emission of a second photon.
a) Light amplification
b) Attenuation c) Dispersion d) Population inversion
a) Light amplification
b) Attenuation c) Dispersion d) Population inversion
Anonymous Quiz
45%
A
16%
B
23%
C
16%
D
A semiconductor laser crystal of length 5 cm, refractive index 1.8 is used as an optical source. Determine the frequency separation of the modes.
a) 2.8 GHz
b) 1.2 GHz c) 1.6 GHz d) 2 GHz
a) 2.8 GHz
b) 1.2 GHz c) 1.6 GHz d) 2 GHz
Anonymous Quiz
30%
A
26%
B
41%
C
4%
D
Longitudinal modes contribute only a single spot of light to the laser output.
a) True
b) False
a) True
b) False
Anonymous Quiz
95%
A
5%
B