MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Electromagnetic Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Dipole moments are used to calculate the |
| A. | Electric field intensity |
| B. | Polarisation patterns |
| C. | Strength of the dipole in the field |
| D. | Susceptibility |
| Answer» C. Strength of the dipole in the field | |
| 2. |
Dipoles in any electric field undergo |
| A. | Magnetism |
| B. | Electromagnetism |
| C. | Magnetisation |
| D. | Polarisation |
| Answer» E. | |
| 3. |
The CO2 molecule is a dipole. The statement is ______ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
An electric dipole is placed inside a cube. What will be the nature of electric flux from the cube surface? |
| A. | Coming out of the surface |
| B. | Coming in towards the surface |
| C. | No flux at all |
| D. | Coming out from one half and coming inwards in another half |
| Answer» D. Coming out from one half and coming inwards in another half | |
| 5. |
Two point charges 1C and -1C are placed 5mm away from each other forming a dipole. What will be the field intensity at a point 15 cm away from the dipole on its axis? |
| A. | 1.66*109 N/C |
| B. | 2.66*1016 N/C |
| C. | 3*1018 N/C |
| D. | 1.4*1016 N/C |
| Answer» C. 3*1018 N/C | |
| 6. |
The electric field at a point on the perpendicular bisector of a dipole is directed ______ |
| A. | Along the dipole moment |
| B. | Perpendicular to the dipole moment |
| C. | Opposite to the dipole moment |
| D. | 45 degree to the dipole moment |
| Answer» D. 45 degree to the dipole moment | |
| 7. |
Dipole moment depends on _______ |
| A. | Charge only |
| B. | Charge and length of a dipole |
| C. | Charge, length of a dipole and dielectric constant of the medium |
| D. | Charge and dielectric constant of the medium |
| Answer» C. Charge, length of a dipole and dielectric constant of the medium | |
| 8. |
If electric field intensity at a certain distance from a dipole on its axis is E1 and at the same distance but on the perpendicular bisector of the dipole is E2, then __________ |
| A. | E1=E2 |
| B. | E1=2 E2 |
| C. | E1=4 E2 |
| D. | E1=3 E2 |
| Answer» C. E1=4 E2 | |
| 9. |
If the force acting on a point charge kept on the axis of an electric dipole is F, what will be the amount of force if the distance of the point charge is doubled from the dipole? |
| A. | 2F |
| B. | \(\frac {F}{8}\) |
| C. | \(\frac {F}{2}\) |
| D. | \(\frac {F}{4}\) |
| Answer» C. \(\frac {F}{2}\) | |
| 10. |
Which among the following molecule is not a dipole? |
| A. | NH3 |
| B. | H2O |
| C. | HCl |
| D. | CH4 |
| Answer» E. | |
| 11. |
DIPOLE_MOMENTS_ARE_USED_TO_CALCULATE_THE?$ |
| A. | Electric field intensity |
| B. | Polarisation patterns |
| C. | Strength of the dipole in the field |
| D. | Susceptibility |
| Answer» C. Strength of the dipole in the field | |
| 12. |
Dipoles in any electric field underg? |
| A. | Magnetism |
| B. | Electromagnetism |
| C. | Magnetisation |
| D. | Polarisation |
| Answer» E. | |
| 13. |
The potential due to the dipole on the midpoint of the two charges will be |
| A. | 0 |
| B. | Unity |
| C. | ‚àû |
| D. | -‚àû |
| Answer» D. -‚Äö√Ñ√∂‚àö‚Ć‚àö¬™ | |
| 14. |
Calculate the distance between two charges of 4C forming a dipole, with a dipole moment of 6 units. |
| A. | 1 |
| B. | 1.5 |
| C. | 2 |
| D. | 2.5 |
| Answer» C. 2 | |
| 15. |
For two charges 3C and -3C separated by 1cm and are located at distances 5cm and 7cm respectively from the point P, then the distance between their midpoint and the point P will be |
| A. | 5.91 |
| B. | 12.6 |
| C. | 2 |
| D. | 9 |
| Answer» B. 12.6 | |
| 16. |
Find the potential due the dipole when the angle subtended by the two charges at the point P is perpendicular. |
| A. | 0 |
| B. | Unity |
| C. | ‚àû |
| D. | -‚àû |
| Answer» B. Unity | |
| 17. |
Find the angle at which the potential due a dipole is measured, when the distance from one charge is 12cm and that due to other is 11cm, separated to each other by a distance of 2cm. |
| A. | 15 |
| B. | 30 |
| C. | 45 |
| D. | 60 |
| Answer» E. | |
| 18. |
Calculate the dipole moment of a dipole with equal charges 2C and -2C separated by a distance of 2cm. |
| A. | 0.02 |
| B. | 0.04 |
| C. | 0.06 |
| D. | 0.08 |
| Answer» C. 0.06 | |
| 19. |
The potential due to a dipole at a point P from it is the |
| A. | Sum of potentials at the charges |
| B. | Difference of potentials at the charges |
| C. | Multiplication of potentials at the charges |
| D. | Ratio of potentials at the charges |
| Answer» C. Multiplication of potentials at the charges | |
| 20. |
Choose the best definition of a dipole. |
| A. | A pair of equal and like charges located at the origin |
| B. | A pair of unequal and like charges located at the origin |
| C. | A pair of equal and unlike charges separated by a small distance |
| D. | A pair of unequal and unlike charges separated by a small distance |
| Answer» D. A pair of unequal and unlike charges separated by a small distance | |