MCQOPTIONS
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MCQOPTIONS
This section includes 13 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 relative dielectric constant of polystyrene is 2.5. What is the polarization produced when 0.5 mm thick sheet of polystyrene is subjected to 220 V? |
| A. | 2.78 X 10<sup>-6</sup> C/m |
| B. | 3.91 X 10<sup>-6</sup> C/m |
| C. | 4.12 X 10<sup>-6</sup> C/m |
| D. | 5.84 X 10<sup>-6</sup> C/m |
| Answer» E. | |
| 2. |
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> | |
| 3. |
The dielectric constant of helium is 1.000684. If N is 2.7 X 1025 atoms/m3, what is the radius of the electronic cloud? |
| A. | 3.78 X 10<sup>-11</sup> m |
| B. | 4.65 X 10<sup>-11</sup> m |
| C. | 5.87 X 10<sup>-11</sup> m |
| D. | 6.12 X 10<sup>-11</sup> m |
| Answer» D. 6.12 X 10<sup>-11</sup> m | |
| 4. |
An oxygen atom produced a dipole moment of 5 X 10-23 cm when subjected to an electric field. If the separation between the center of electronic cloud and the nucleus is 4 X 10-17 m, what is the polarizability of the oxygen atom? |
| A. | 1.4 X 10<sup>-47</sup> Fm<sup>2</sup> |
| B. | 1.7 X 10<sup>-47</sup> Fm<sup>2</sup> |
| C. | 1.8 X 10<sup>-47</sup> Fm<sup>2</sup> |
| D. | 1.9 X 10<sup>-47</sup> Fm<sup>2</sup> |
| Answer» E. | |
| 5. |
What is the polarizability of an argon atom if the relative permittivity of argon at NTP is 1.000435? |
| A. | 1.21 X 10<sup>-40</sup> Fm<sup>2</sup> |
| B. | 1.37 X 10<sup>-40</sup> Fm<sup>2</sup> |
| C. | 1.43 X 10<sup>-40</sup> Fm<sup>2</sup> |
| D. | 1.55 X 10<sup>-40</sup> Fm<sup>2</sup> |
| Answer» D. 1.55 X 10<sup>-40</sup> Fm<sup>2</sup> | |
| 6. |
The frequency for electronic polarization lies in which region of the electromagnetic spectrum? |
| A. | Microwave |
| B. | Infrared |
| C. | Visible |
| D. | Ultraviolet |
| Answer» E. | |
| 7. |
Which category of polarizability strongly depends on Temperature and frequency? |
| A. | Ionic Polarization |
| B. | Space-charge polarization |
| C. | Orientational Polarization |
| D. | Electronic Polarization |
| Answer» D. Electronic Polarization | |
| 8. |
Space charge polarization is mostly observed in ____________ |
| A. | Uni-phasic material |
| B. | Biphasic material |
| C. | Multiphasic material |
| D. | Crystal |
| Answer» D. Crystal | |
| 9. |
The dipole is least stable when the angle between the dipole and the field is _____________ |
| A. | 0 |
| B. | 45 |
| C. | 90 |
| D. | 180 |
| Answer» E. | |
| 10. |
In which category of polarization Electric field is used to develop a net dipole moment in dipolar substances? |
| A. | Ionic Polarization |
| B. | Space-charge polarization |
| C. | Orientational Polarization |
| D. | Electronic Polarization |
| Answer» D. Electronic Polarization | |
| 11. |
Electronic polarizability is dependent of temperature. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
NaCl falls under which category of polarization? |
| A. | Ionic Polarization |
| B. | Space-charge polarization |
| C. | Dipolar Polarization |
| D. | Electronic Polarization |
| Answer» B. Space-charge polarization | |
| 13. |
The four types of polarization are Electronic Polarization, Ionic Polarization, Space-charge polarization and ______ |
| A. | Magnetic Polarization |
| B. | Electric Polarization |
| C. | Orientational Polarization |
| D. | Potential Polarization |
| Answer» D. Potential Polarization | |