Discussion
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- Question
The spin angular momentum along a given direction is either
or 
.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The equation D = ?0?r E refers only to isotropic materials.
Options- A. True
- B. False Discuss
- 2. Lines of magnetic field cannot intersect.
Options- A. True
- B. False Discuss
- 3. Assertion (A): Diamond and carborudum are both very hard materials.
Reason (R): Valence band can be extremely strong.
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
- 4. If there are no permanent dipoles in a dielectric material, the dielectric constant is independent of temperature.
Options- A. True
- B. False Discuss
- 5. Assertion (A): Magnetic susceptibility of copper is -0.5 x 10-5.
Reason (R): Copper is diamagnetic material.
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
- 6. A dielectric is subjected to alternating field. The dielectric losses are potential to
Options- A. real part of dielectric constant
- B. imaginary part of dielectric constant
- C. both real and imaginary parts of dielectric constant
- D. either real or imaginary part of dielectric constant Discuss
- 7. The number of tightly bound electrons in silicon atom are
Options- A. 14
- B. 10
- C. 6
- D. 4 Discuss
- 8. Electric dipole moment is usually expressed in debye units. Here, 1 debye unit equals
Options- A. 3.33 x 10-30 C-m
- B. 3.33 x 10-30 C-m2
- C. 3.30 x 10-10 C-m
- D. 3.33 x 10-10 C-m2 Discuss
- 9. An electron (charge -e) is rotating in a circular orbit of radius R, around a proton with charge +e at a constant angular velocity ?. The orbital magnetic dipole moment is
Options- A. 0.5 e? R2
- B. e? R2
- C. 2 e? R2
- D. 0.5 e? R3 Discuss
- 10. The dielectrics having only one kind of atoms are known as elemental dielectrics.
Options- A. True
- B. False Discuss
Materials and Components problems
Search Results
Correct Answer: True
Correct Answer: True
Correct Answer: Both A and R are true and R is correct explanation of A
Explanation:
Valence bond results in hardness.
Correct Answer: True
Correct Answer: Both A and R are true and R is correct explanation of A
Explanation:
If magnetic susceptibility is very low ?, is nearly equal to 1 and the material is diamagnetic.
Correct Answer: imaginary part of dielectric constant
Explanation:
Absorption of energy is proportional to imaginary part of complex dielectric constant.
Correct Answer: 10
Explanation:
Silicon has 14 electons and 4 valence electrons. The 10 electrons in the inner orbits are tightly bound.
Correct Answer: 3.33 x 10-30 C-m
Correct Answer: 0.5 e? R2
Correct Answer: True
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