Discussion
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- Question
If there are no permanent dipoles in a dielectric material, the dielectric constant is independent of temperature.
Options- A. True
- B. False
- Correct Answer
- True
- 1. 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
- 2. If the valence electron is separated from a copper atom, the remaining part of atom has a net charge of
Options- A. 1
- B. - 1
- C. 0
- D. + 3 Discuss
- 3. The orientation polarization of a polyatomic gas is inversely proportional to absolute temperature.
Options- A. True
- B. False Discuss
- 4. In a virgin specimen of iron, the direction of spontaneous magnetisation varies from domain to domain.
Options- A. True
- B. False Discuss
- 5. A sheet of bakelite is inserted between the plates of an air capacitor. The capacitance will
Options- A. increase
- B. decrease
- C. remain the same
- D. may increase or decrease Discuss
- 6. 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
- 7. Lines of magnetic field cannot intersect.
Options- A. True
- B. False Discuss
- 8. The equation D = ?0?r E refers only to isotropic materials.
Options- A. True
- B. False Discuss
- 9. The spin angular momentum along a given direction is either
or 
.
Options- A. True
- B. False Discuss
- 10. 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
Materials and Components problems
Search Results
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: 1
Correct Answer: True
Correct Answer: True
Correct Answer: increase
Explanation:
Bakelite has higher permittivity than air.
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: True
Correct Answer: True
Correct Answer: imaginary part of dielectric constant
Explanation:
Absorption of energy is proportional to imaginary part of complex dielectric constant.
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