Discussion
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- Question
While keeping the down-link frequency constant, the diameter of a satellite antenna is reduced by half. To offer the same EIRP over the increased coverage area, the RF output power has to be increases by a factor of
Options- A. 2
- B. 4
- C. 8
- D. 16
- Correct Answer
- 4
- 1. A copper atom is neutral. Its core has a net charge of
Options- A. 0
- B. + 1
- C. - 1
- D. + 2 Discuss
- 2. The characteristics of which device has peak point and valley point
Options- A. SCR
- B. PUT
- C. SCS
- D. Shockley diode Discuss
- 3. Schrodinger wave equation is partial differential equation.
Options- A. True
- B. False Discuss
- 4. The output frequency of a cycloconverter can be changed by changing the firing angle.
Options- A. True
- B. False Discuss
- 5. Most of the memory chips in static RAM
Options- A. do not require any supply
- B. need 2 V supply
- C. need 5 V supply
- D. need 12 V supply Discuss
- 6. In crystalline solids, atoms are stacked in a regular manner.
Options- A. True
- B. False Discuss
- 7. The classes of solid dielectrics are
Options- A. A, B, C, D, E, F, H
- B. A E B F H C D
- C. Y A E B F H C
- D. A E B F H C Discuss
- 8. The unit for mmf is
Options- A. A
- B. Wb
- C. T
- D. V Discuss
- 9. In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally
Options- A. equal
- B. different
- C. equal or different
- D. different but sometimes equal Discuss
- 10. The real part of complex dielectric constant and tan? for a dielectric are 2.1 and 5 x 10-4 at 100 Hz respectively. The imaginary part of dielectric constant at 100 Hz is
Options- A. 1.05 x 10-3
- B. 2.1 x 10-3
- C. 5 x 10-3
- D. 1.05 x 10-2 Discuss
More questions
Correct Answer: + 1
Correct Answer: PUT
Correct Answer: True
Correct Answer: False
Correct Answer: need 5 V supply
Explanation:
Digital chips need 5 V supply.
Correct Answer: True
Correct Answer: Y A E B F H C
Correct Answer: A
Correct Answer: equal
Explanation:
Firing angles are kept equal to get symmetrical output voltage.
Correct Answer: 1.05 x 10-3
Explanation:
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