Why neighbouring stations are assigned different group of channels in cellular system?
a) To minimize interference
b) To minimize area c) To maximize throughput d) To maximize capacity of each cell
a) To minimize interference
b) To minimize area c) To maximize throughput d) To maximize capacity of each cell
Anonymous Quiz
36%
A
24%
B
24%
C
16%
D
What is a cell in cellular system?
a) A group of cells
b) A group of subscribers c) A small geographical area d) A large group of mobile systems
a) A group of cells
b) A group of subscribers c) A small geographical area d) A large group of mobile systems
Anonymous Quiz
36%
A
8%
B
44%
C
12%
D
What is frequency reuse?
a) Process of selecting and allocating channels
b) Process of selection of mobile users c) Process of selecting frequency of mobile equipment d) Process of selection of number of cells
a) Process of selecting and allocating channels
b) Process of selection of mobile users c) Process of selecting frequency of mobile equipment d) Process of selection of number of cells
Anonymous Quiz
38%
A
8%
B
38%
C
17%
D
Which of the following is a universally adopted shape of cell?
a) Square
b) Circle c) Triangle d) Hexagon
a) Square
b) Circle c) Triangle d) Hexagon
Anonymous Quiz
10%
A
28%
B
17%
C
45%
D
Actual radio coverage of a cell is called __________
a) Fingerprint
b) Footprint c) Imprint d) Matrix
a) Fingerprint
b) Footprint c) Imprint d) Matrix
Anonymous Quiz
0%
A
43%
B
29%
C
29%
D
Why the shape of cell is not circle?
a) Omni directionality
b) Small area c) Overlapping regions or gaps are left d) Complex design
a) Omni directionality
b) Small area c) Overlapping regions or gaps are left d) Complex design
Anonymous Quiz
3%
A
14%
B
76%
C
7%
D
What is the main reason to adopt hexagon shape in comparison to square and triangle?
a) Largest area
b) Simple design c) Small area d) Single directional
a) Largest area
b) Simple design c) Small area d) Single directional
Anonymous Quiz
52%
A
17%
B
21%
C
10%
D
👍1😱1
Which type of antenna is used for center excited cells?
a) Dipole antenna
b) Grid antenna c) Sectored antenna d) Omnidirectional antenna
a) Dipole antenna
b) Grid antenna c) Sectored antenna d) Omnidirectional antenna
Anonymous Quiz
22%
A
41%
B
22%
C
16%
D
Which type of antenna is used for edge excited cells?
a) Omnidirectional antenna
b) Grid antenna c) Sectored directional antenna d) Dipole antenna
a) Omnidirectional antenna
b) Grid antenna c) Sectored directional antenna d) Dipole antenna
Anonymous Quiz
22%
A
28%
B
28%
C
22%
D
What is a cluster in a cellular system?
a) Group of frequencies
b) Group of cells c) Group of subscribers d) Group of mobile systems
a) Group of frequencies
b) Group of cells c) Group of subscribers d) Group of mobile systems
Anonymous Quiz
25%
A
47%
B
14%
C
14%
D
. A perfect semiconductor crystal containing no impurities or lattice defects is called as __________
a) Intrinsic semiconductor
b) Extrinsic semiconductor c) Excitation d) Valence electron
a) Intrinsic semiconductor
b) Extrinsic semiconductor c) Excitation d) Valence electron
Anonymous Quiz
59%
A
24%
B
17%
C
0%
D
The energy-level occupation for a semiconductor in thermal equilibrium is described by the __________
a) Boltzmann distribution function
b) Probability distribution function c) Fermi-Dirac distribution function d) Cumulative distribution function
a) Boltzmann distribution function
b) Probability distribution function c) Fermi-Dirac distribution function d) Cumulative distribution function
Anonymous Quiz
26%
A
4%
B
67%
C
4%
D
_________________ is used when the optical emission results from the application of electric field.
a) Radiation
b) Efficiency c) Electro-luminescence d) Magnetron oscillator
a) Radiation
b) Efficiency c) Electro-luminescence d) Magnetron oscillator
Anonymous Quiz
32%
A
7%
B
50%
C
11%
D
The recombination in indirect band-gap semiconductors is slow.
a) True
b) False
a) True
b) False
Anonymous Quiz
69%
A
31%
B
👍1👏1
Which impurity is added to gallium phosphide to make it an efficient light emitter?
a) Silicon
b) Hydrogen c) Nitrogen d) Phosphorus
a) Silicon
b) Hydrogen c) Nitrogen d) Phosphorus
Anonymous Quiz
23%
A
13%
B
10%
C
53%
D
How many types of hetero-junctions are available?
a) Two
b) One c) Three d) Four
a) Two
b) One c) Three d) Four
Anonymous Quiz
30%
A
30%
B
33%
C
7%
D
Stimulated emission by recombination of injected carriers is encouraged in __________
a) Semiconductor injection laser
b) Gas laser c) Chemist laser d) Dye laser
a) Semiconductor injection laser
b) Gas laser c) Chemist laser d) Dye laser
Anonymous Quiz
50%
A
35%
B
15%
C
0%
D
Gain guided laser structure are __________
a) Chemical laser
b) Gas laser c) DH injection laser d) Quantum well laser
a) Chemical laser
b) Gas laser c) DH injection laser d) Quantum well laser
Anonymous Quiz
17%
A
21%
B
38%
C
25%
D
Laser modes are generally separated by few __________
a) Tenths of micrometer
b) Tenths of nanometer c) Tenths of Pico-meter d) Tenths of millimeter
a) Tenths of micrometer
b) Tenths of nanometer c) Tenths of Pico-meter d) Tenths of millimeter
Anonymous Quiz
7%
A
41%
B
44%
C
7%
D