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- Question
Match the following:
List I (Logic family) List II (Characteristic of logic family) A. TTL 1. Maximum power Consumption B. ECL 2. Highest Packing Density C. NMOS 3. Least Power Consumption D. CMOS 4. Saturated Logic
Options- A. A-1, B-4, C-2, D-3
- B. A-1, B-4, C-3, D-2
- C. A-4, B-1, C-2, D-3
- D. A-4, B-1, C-3, D-2
- Correct Answer
- A-4, B-1, C-2, D-3
- 1. A radar has a maximum range of 120 km. The maximum allowable pulse repetition frequency for unambiguous reception is
Options- A. 1250
- B. 330
- C. 2500
- D. 8330 Discuss
- 2. An unmodulated voltage 10 V effective is applied to a dioxide detector in which load resistance is 4 x 10-5 ohms. A micrometer shows that the rectified DC current in this resistance is 30 A. The input resistance of the detector is
Options- A. 114 kW
- B. 336 kW
- C. 384 kW
- D. 455 kW Discuss
- 3. For a BJT a = 0.98, then ? =
Options- A. 0.02
- B. 0.5
- C. 4.9
- D. 48 Discuss
- 4. If the temperature of an extrinsic semiconductor is increased so that the intrinsic carrier concentration is doubled, then
Options- A. the majority carrier density is doubled
- B. the minority carrier density is doubled
- C. the minority carrier density becomes 4 times the original value
- D. both the majority and minority carrier densities double Discuss
- 5. A cycloconverter is
Options- A. ac-dc converter
- B. dc-ac converter
- C. dc-dc converter
- D. ac-ac converter Discuss
- 6. Consider the following DO statement in Fortran 77
DO 52 N = 1, 10, 3
The number of DO loop executions in the above statement is
Options- A. 1
- B. 10
- C. 3
- D. 4 Discuss
- 7. In a single phase semiconverter feeding a highly inductive load, the load current is
Options- A. sinusoidal
- B. nearly constant
- C. absolutely constant
- D. rectangular Discuss
- 8. If ton and toff are the turn on and turn off times of a thyristor, then
Options- A. ton and toff are almost equal
- B. ton >> toff
- C. toff >> ton
- D. ton is about twice toff Discuss
- 9. Which inverter circuit uses coupled inductors?
Options- A. Modified McMurray full bridge inverter
- B. McMurray Bedford half bridge inverter
- C. Modified McMurray Bedford half bridge inverter
- D. Both (b) and (c) Discuss
- 10. If there are no permanent dipoles in a dielectric material, the dielectric constant is independent of temperature.
Options- A. True
- B. False Discuss
More questions
Correct Answer: 1250
Correct Answer: 336 kW
Correct Answer: 48
Explanation:
Correct Answer: both the majority and minority carrier densities double
Explanation:
As the intrinsic carrier concentration is doubled, the concentration of both electrons and holes is doubled.
Correct Answer: ac-ac converter
Explanation:
It changes ac at frequency f into ac at a frequency different from f.
Correct Answer: 4
Explanation:
Do statement is executed when N = 1, 4, 7, 10, i.e., a total of 4 times.
Correct Answer: nearly constant
Correct Answer: toff >> ton
Explanation:
Turn on time is less than 3 ?s while turn off time is between 10-300 ?s.
Correct Answer: Both (b) and (c)
Correct Answer: True
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