MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the electric field intensity at 10cm away from a point charge of 100 esu. |
| A. | 1 dyne/esu |
| B. | 10 dyne/esu |
| C. | 100 dyne/esu |
| D. | 9*10<sup>9</sup> dyne/esu |
| Answer» B. 10 dyne/esu | |
| 2. |
A ball of 80mg mass and a 2*10-8 charge is hung with a thread in a uniform horizontal electric field of 2*104V/m. What is the angle made by the thread with vertical? |
| A. | 27 degree |
| B. | 30 degree |
| C. | 45 degree |
| D. | 0 degree |
| Answer» B. 30 degree | |
| 3. |
Electric field intensity at the center of a square is _____ if +20 esu charges are placed at each corner of the square having side-length as 10 cm. |
| A. | 0 |
| B. | 0.4 dyne/esu |
| C. | 2 dyne/esu |
| D. | 1.6 dyne/esu |
| Answer» B. 0.4 dyne/esu | |
| 4. |
V/m is the unit of ______ |
| A. | Electric field intensity |
| B. | Electric flux |
| C. | Electric potential |
| D. | Charge |
| Answer» B. Electric flux | |
| 5. |
What is the dimension of electric field intensity? |
| A. | [M L T<sup>-2</sup> I<sup>-1</sup>] |
| B. | [M L T<sup>-3</sup> I<sup>-1</sup>] |
| C. | [M L T<sup>-2</sup> I<sup>-2</sup>] |
| D. | [M L T<sup>-3</sup> I] |
| Answer» C. [M L T<sup>-2</sup> I<sup>-2</sup>] | |
| 6. |
Two point charges +4q and +q are kept at a distance of 30 cm from each other. At which point between them, the field intensity will be equal to zero? |
| A. | 15cm away from the +4q charge |
| B. | 20cm away from the +4q charge |
| C. | 7.5cm away from the +q charge |
| D. | 5cm away from the +q charge |
| Answer» C. 7.5cm away from the +q charge | |
| 7. |
Electric field is a _______ |
| A. | Scalar quantity |
| B. | Vector quantity |
| C. | Tensor quantity |
| D. | Quantity that has properties of both scalar and vector |
| Answer» C. Tensor quantity | |
| 8. |
An electron of mass m is kept in a vertical electric field of magnitude E. What must be the value of E so that the electron doesn t fall due to gravity? |
| A. | m*g*e |
| B. | ( frac {e}{(m*g)} ) |
| C. | ( frac {(m*g)}{e} ) |
| D. | ( frac {1}{(m*g*e)} ) |
| Answer» D. ( frac {1}{(m*g*e)} ) | |
| 9. |
Two point charges of the same polarities are hung with the help of two threads and kept close. The angle between the threads will be _________ if the system is taken to space. |
| A. | 180 degree |
| B. | 90 degree |
| C. | 45 degree |
| D. | 60 degree |
| Answer» B. 90 degree | |
| 10. |
A uniformly charged sphere of radius R has charge +Q. A point charge q is placed at a distance of 2R from the center of the sphere. The point charge will execute the simple harmonic motion. The statement is _____ |
| A. | False |
| B. | True |
| Answer» B. True | |
| 11. |
Two point charges q1 and q2 are situated at a distance d. There is no such point in between them where the electric field is zero. What can we deduce? |
| A. | There is no such point |
| B. | The charges are of the same polarity |
| C. | The charges are of opposite polarity |
| D. | The charges must be unequal |
| Answer» D. The charges must be unequal | |
| 12. |
Electric field due to a uniformly charged hollow sphere at a distance of r (where r is greater than the radius of the sphere) is __________ |
| A. | Proportional to r |
| B. | Inversely proportional to r |
| C. | Proportional to r<sup>2</sup> |
| D. | Inversely proportional to r<sup>2</sup> |
| Answer» E. | |
| 13. |
Electric field inside a hollow conducting sphere ______ |
| A. | Increases with distance from the center of the sphere |
| B. | Decreases with distance from the center of the sphere |
| C. | Is zero |
| D. | May increase or decrease with distance from the center |
| Answer» D. May increase or decrease with distance from the center | |
| 14. |
The direction of electric field created by a negative charge is ___________ |
| A. | Directed outwards |
| B. | Directed towards the charge |
| C. | Maybe outwards or towards the charge |
| D. | Circular in shape |
| Answer» C. Maybe outwards or towards the charge | |
| 15. |
The amount of force exerted on a unit positive charge in an electric field is known as _____ |
| A. | Electric field intensity |
| B. | Electric flux |
| C. | Electric potential |
| D. | Electric lines of force |
| Answer» B. Electric flux | |