Discussion
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- Question
In body centred cubic structure, comers and centre of the cube are occupied by identical atoms.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The class of insulation of impregnated paper is
Options- A. A
- B. B
- C. C
- D. F Discuss
- 2. The transition of electron from energy level W1 to W2 is associated with emission or absorption of electro magnetic radiation of frequency f such that
Options- A. hf = |W1 - W2|
- B. |W1 - W2|f = h
- C. hf = 0.5|W1 - W2|
- D. (hf)2 = |W1 - W2| Discuss
- 3. The colour code on a carbon resistor is green-blue-yellow. The tolerance is
Options- A. ± 5%
- B. ± 10%
- C. ± 20%
- D. ± 30% Discuss
- 4. Assertion (A): Helium, Argon and Neon are gaseous at room temperature.
Reason (R): The atoms in Helium, Argon and Neon are chemically extremely inactive.
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 Discuss
- 5. At a very low temperature, a semiconductor
Options- A. becomes a conductor
- B. becomes an insulator
- C. may become a conductor or an insulator
- D. will remain a semiconductor becomes a conductor or an insulator Discuss
- 6. An iron specimen has µr = 1000 when B = 0.3 T. If B = 0.35 T, µr
Options- A. will be 1000
- B. will be less than 1000
- C. will be more than 1000
- D. may be more or less than 1000 Discuss
- 7. If v is the velocity of electron, tc is the average time between collisions, the mean free path ? = vtc.
Options- A. True
- B. False Discuss
- 8. The colour code on a carbon resistor is red-red-black-silver. The value of resistor is
Options- A. 22000 ?
- B. 2200 ?
- C. 22 ± 5% ?
- D. 22 ± 10% ? Discuss
- 9. The orientation polarization is
- directly proportional to temperature
- inversely proportional to temperature
- inversely proportional to square of permanent dipole moment
- directly proportional to square of permanent dipole moment.
Options- A. 1 and 3 only
- B. 2 and 3 only
- C. 1 and 4 only
- D. 2 and 4 only Discuss
- 10. To produce magnetic flux, mmf is necessary.
Options- A. True
- B. False Discuss
Materials and Components problems
Search Results
Correct Answer: A
Correct Answer: hf = |W1 - W2|
Correct Answer: ± 30%
Correct Answer: Both A and R are true and R is correct explanation of A
Correct Answer: becomes an insulator
Explanation:
Semi conductor becomes insulator at very low temperature.
Correct Answer: may be more or less than 1000
Correct Answer: True
Correct Answer: 22 ± 10% ?
Correct Answer: 2 and 4 only
Correct Answer: True
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