Electronics and Communication Engineering - Exam Questions Papers
Exercise :: Exam Questions Papers - Exam Paper 13
1.
Following state diagram shows clocked sequential circuit: How many states the sequential circuit has?
Answer: Option C
Explanation:
2.
Which of the following oscillators is used for the generation of high frequencies?
A.
R-C phase shift oscillator B.
Wien bridge oscillator C.
L-C oscillator D.
Blocking oscillator
Answer: Option C
Explanation:
3.
Which of the following meters cannot measure a.c. quantities?
A.
Thermocouple B.
Hot wire C.
P.M.M.C. D.
Electrodynamometer.
Answer: Option C
Explanation:
4.
For the circuit shown in the figure, D has a transition from 0 to 1 after CLK changes from 1 to 0. Assume gate delays to be negligible Which of the following statements is true?
A.
Q goes to 1 to the CLK transition and stays at 1 B.
Q goes to 0 at the CLK transition and stays at 10 C.
Q goes to 1 at the CLK transition and goes to 0 when D goes to 1 D.
Q goes to 0 at the CLK transition and goes to 1 when D goes to 1
Answer: Option C
Explanation:
5.
What is the major cause of creeping in an energy-meter?
A.
Over compensation for friction B.
Mechanical vibrations C.
Excessive voltage across the potential coil D.
Stray magnetic fields
Answer: Option A
Explanation: