Discussion
Home ‣ Electronics and Communication Engineering ‣ Materials and Components See What Others Are Saying!
- Question
The core of an atom consists of
Options- A. nucleus
- B. nucleus and all orbits
- C. nucleus and inner orbits
- D. none of the above
- Correct Answer
- nucleus and inner orbits
- 1. An atom of polarizability a is placed in a homogeneous electric field E. The energy stored in polarized atom is
Options- A. aE2
- B. a2E
- C. ½ aE2
- D. ½ aE Discuss
- 2. A receiver having poor IF selectivity will also have poor
Options- A. sensitivity
- B. double spotting
- C. blocking
- D. all of the above Discuss
- 3. In a metal the probability of a state 0.1 eV below Fermi level being occupied
Options- A. is more than the probability of state 0.1 eV above Fermi level being occupied
- B. is the same as the probability of state 0.1 eV above Fermi level being occupied
- C. is less than the probability of state 0.1 eV above Fermi level being occupied
- D. may be equal to or more or less than the probability of state 0.1 eV above Fermi level being occupied Discuss
- 4. Class A and class B chopper
Options- A. operate in first quadrant
- B. operate in second quadrant
- C. class A chopper operates in first quadrant while class B operates in second quadrant
- D. may operate in either first or second quadrant Discuss
- 5. A semiconverter feeding an RLE load operates in
Options- A. first quadrant only
- B. first and second quadrants
- C. first and fourth quadrants
- D. first and third quadrants Discuss
- 6. In a true valence crystal, the bonding between the atoms is accomplished by the sharing of valence electrons.
Options- A. True
- B. False Discuss
- 7. Geosynchronous communication satellites travel around the earth in circular orbits with a forward speed of about __________ km/h.
Options- A. 11200
- B. 0
- C. 36000
- D. 22800 Discuss
- 8. A single phase half bridge inverter required to feed R-L loads needs
Options- A. 2 thyristors
- B. 4 thyristors
- C. 2 thyristors and two diodes
- D. 4 thyristors and 4 diodes Discuss
- 9. A stepper motor is
Options- A. a two phase induction motor
- B. is a kind of rotating amplifier
- C. is an electromagnetic transducer used to convert an angular position of shaft into electrical signal
- D. is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis Discuss
- 10. A single phase half wave controlled rectifier circuit has an R-L load. A freewheeling diode is also in the circuit. When freewheeling diode is conducting the SCR
Options- A. is forward biased
- B. is reverse biased
- C. may be forward biased or reverse biased
- D. forward biased initially but reverse biased afterwards Discuss
More questions
Correct Answer: ½ aE2
Correct Answer: blocking
Correct Answer: is more than the probability of state 0.1 eV above Fermi level being occupied
Correct Answer: class A chopper operates in first quadrant while class B operates in second quadrant
Correct Answer: first quadrant only
Explanation:
Semiconvertor operates only in first quadrant.
Correct Answer: True
Explanation:
Sharing of valence electons is a characteristic of true valence crystal.
Correct Answer: 11200
Correct Answer: 2 thyristors and two diodes
Correct Answer: is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis
Explanation:
When input pulses are applied, the motor moves in steps.
Correct Answer: is reverse biased
Explanation:
Free wheeling diode is forward biased only when SCR is reverse biased.
Comments
There are no comments.More in Electronics and Communication Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.