CuriousTab
CuriousTab
Home
Aptitude
Computer
C Programming
C# Programming
C++ Programming
Database
Java Programming
Networking
Engineering
Biochemical Engineering
Biochemistry
Biotechnology
Chemical Engineering
Civil Engineering
Computer Science
Digital Electronics
Electrical Engineering
Electronics
Electronics and Communication Engineering
Mechanical Engineering
Microbiology
Technical Drawing
GK
Current Affairs
General Knowledge
Reasoning
Data Interpretation
Logical Reasoning
Non Verbal Reasoning
Verbal Ability
Verbal Reasoning
Exams
AIEEE
Bank Exams
CAT
GATE
IIT JEE
TOEFL
Jobs
Analyst
Bank Clerk
Bank PO
Database Administrator
IT Trainer
Network Engineer
Project Manager
Software Architect
Discussion
Home
‣
Electronics and Communication Engineering
‣
Materials and Components
See What Others Are Saying!
Question
At 0 K, silicon and germanium behave like monoatomic crystals.
Options
A. True
B. False
Correct Answer
False
More questions
1. The attenuation characteristics of a loaded line is similar to that of
Options
A. low pass filter
B. high pass filter
C. band pass filter
D. band stop filter
Show Answer
Scratch Pad
Discuss
Correct Answer: band stop filter
2. In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
3. The household radio receiver uses
Options
A. synchronous
B. envelope detector
C. radio detector
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: envelope detector
4. Which chopper circuit uses saturable reactor?
Options
A. Auxiliary commutated
B. Jones chopper
C. Morgan chopper
D. Load commutated
Show Answer
Scratch Pad
Discuss
Correct Answer: Morgan chopper
5. For an illumination control circuit it is advisable to use a matched TRIAC-DIAC pair.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
6. Fibers have numerical aperture (
NA
) in the range of 0.15 to 0.4 Fibers with higher
NA
value would have
Options
A. reduced losses
B. high bandwidth
C. reduced losses and low bandwidth
D. more losses and low bandwidth
Show Answer
Scratch Pad
Discuss
Correct Answer: more losses and low bandwidth
7. Radar reciever has high sensitivity and low noise figure
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
8. A single phase electric heater uses phase controlled thyristors. The firing angle is 90°. The degree of heating is
Options
A. 25% of maximum
B. 50% of maximum
C. 75% of maximum
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: 50% of maximum
Explanation:
Conduction occurs only during 50% of wave.
9. A characteristic property of crystal is its periodicity of structure.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
10. The number of distinct Boolean expression of 4 variables is
Options
A. 16
B. 256
C. 1024
D. 65536
Show Answer
Scratch Pad
Discuss
Correct Answer: 65536
Explanation:
2
2
n
= 2
2
4
= 2
16
.
Comments
There are no comments.
Enter a new Comment
Save
More in Electronics and Communication Engineering:
Analog Electronics
Automatic Control Systems
Communication Systems
Digital Electronics
Electromagnetic Field Theory
Electronic Devices and Circuits
Exam Questions Papers
Matching Questions
Materials and Components
Measurements and Instrumentation
Microprocessors
Microwave Communication
Networks Analysis and Synthesis
Power Electronics
Radio Receivers
Satellite Communication
Signals and Systems