MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The expression for electric susceptibility is ___________ |
| A. | <sub>o</sub>E |
| B. | <sub>o</sub>EK |
| C. | <sub>o</sub>E (K + 1) |
| D. | <sub>o</sub>E (K 1) |
| Answer» D. <sub>o</sub>E (K 1) | |
| 2. |
What is the new capacitance of the plates, when a slab of Dielectric Constant K and thickness one-fourth of the separation of plate is inserted between the plates? |
| A. | 4KC<sub>o</sub>/K + 2 |
| B. | 4KC<sub>o</sub>/1 + 2K |
| C. | 4KC<sub>o</sub>/K + 3 |
| D. | 4KC<sub>o</sub>/1 + 3K |
| Answer» E. | |
| 3. |
H2O is a polar dielectric. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
In the formula, P = eE, what is e called? |
| A. | Electric constant |
| B. | Polarizing constant |
| C. | Electric susceptibility |
| D. | Polarizing susceptibility |
| Answer» D. Polarizing susceptibility | |
| 5. |
In a water drop of radius 1 mm all the molecular dipole points are in the same direction. If the dipole moment of a water molecule is 6 X 10-30 m, the polarization in the water drop is ___________ |
| A. | 6.4 X 10<sup>-13</sup> m<sup>-2</sup> |
| B. | 7.4 X 10<sup>-13</sup> m<sup>-2</sup> |
| C. | 8.4 X 10<sup>-13</sup> m<sup>-2</sup> |
| D. | 9.4 X 10<sup>-13</sup> m<sup>-2</sup> |
| Answer» D. 9.4 X 10<sup>-13</sup> m<sup>-2</sup> | |
| 6. |
Polarization is defined as the dipole moment __________ |
| A. | per unit length |
| B. | per unit area |
| C. | per unit volume |
| D. | per unit time |
| Answer» D. per unit time | |
| 7. |
What is the value of 1 Debye in cm? |
| A. | 3.33 X 10<sup>-28</sup> cm |
| B. | 3.33 X 10<sup>-30</sup> cm |
| C. | 3.33 X 10<sup>-32</sup> cm |
| D. | 3.33 X 10<sup>-34</sup> cm |
| Answer» C. 3.33 X 10<sup>-32</sup> cm | |
| 8. |
The dipole is most stable when the angle between the dipole and the field is __________ |
| A. | 0 |
| B. | 45 |
| C. | 90 |
| D. | 180 |
| Answer» B. 45 | |
| 9. |
The torque induced on a dipole when placed in an electric field E is given by _________ |
| A. | Esin |
| B. | pEsin |
| C. | Ecos |
| D. | pEcos |
| Answer» C. Ecos | |
| 10. |
CO2 is a polar dielectric. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
Dipoles are created when dielectric is placed in __________ |
| A. | Magnetic Field |
| B. | Electric field |
| C. | Vacuum |
| D. | Inert Environment |
| Answer» C. Vacuum | |
| 12. |
The forbidden energy gap of dielectrics is __________ |
| A. | Less than 1.2 eV |
| B. | Greater than or equal to 1.2 eV |
| C. | Less than 3 eV |
| D. | Greater than or equal to 3 eV |
| Answer» E. | |