Discussion
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- Question
Assertion (A): Doping level in extrinsic semiconductors is very small.
Reason (R): Additional of impurity in the ratio of 1 part in 108 parts increases the number of charge carriers by about 20.
Options- A. Both A and R are true and R is correct explanation of A
- B. Both A and R are true but R is not correct explanation of A
- C. A is true but R is false
- D. A is false but R is true
- Correct Answer
- Both A and R are true and R is correct explanation of A
- 1. The characteristic impedance of a cable is about
Options- A. 300 ?
- B. 50 ?
- C. 5 ?
- D. 2 ? Discuss
- 2. A copper atom is neutral. Its core has a net charge of
Options- A. 0
- B. + 1
- C. - 1
- D. + 2 Discuss
- 3. The characteristics of which device has peak point and valley point
Options- A. SCR
- B. PUT
- C. SCS
- D. Shockley diode Discuss
- 4. Schrodinger wave equation is partial differential equation.
Options- A. True
- B. False Discuss
- 5. The output frequency of a cycloconverter can be changed by changing the firing angle.
Options- A. True
- B. False Discuss
- 6. 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
- 7. In crystalline solids, atoms are stacked in a regular manner.
Options- A. True
- B. False Discuss
- 8. 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
- 9. The unit for mmf is
Options- A. A
- B. Wb
- C. T
- D. V Discuss
- 10. 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
More questions
Correct Answer: 50 ?
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.
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