MCQOPTIONS
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MCQOPTIONS
This section includes 34 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the distance between the two point charges become half then force between them becomes |
| A. | Double |
| B. | Half |
| C. | Four times |
| D. | Remains same |
| Answer» D. Remains same | |
| 2. |
A 5 ?F capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is |
| A. | 2.5 x 10-8 C |
| B. | 10-5 C |
| C. | 103 C |
| D. | 4 x 103 C |
| Answer» C. 103 C | |
| 3. |
A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be |
| A. | 900 volts |
| B. | 9000 volts |
| C. | 90 volts |
| D. | Zero |
| Answer» C. 90 volts | |
| 4. |
An electric charge at rest produces |
| A. | Only a magnetic field |
| B. | Only an electric field |
| C. | Neither electric field nor magnetic field |
| D. | Both electric and magnetic fields |
| Answer» C. Neither electric field nor magnetic field | |
| 5. |
An electric field can deflect |
| A. | Neutrons |
| B. | ?-rays |
| C. | Both glass rod and silk acquire negative charge |
| D. | None |
| Answer» E. | |
| 6. |
capacitor is to have an energy content of 20J it must be placed across a potential difference of |
| A. | 4 volts |
| B. | 9 volts |
| C. | 2 volts |
| D. | 1 vol |
| Answer» D. 1 vol | |
| 7. |
Electric charge of 100 ?C is 13cm apart from another charge 16.9?C electric force between them is |
| A. | 9x107N |
| B. | 900N |
| C. | 9x105N |
| D. | 9x106N |
| Answer» C. 9x105N | |
| 8. |
Electric flux due to a point charge +q is |
| A. | 1/4II?? . q/r |
| B. | Q/?? |
| C. | 1/4II?? . q/r2 |
| D. | 4II?? |
| Answer» C. 1/4II?? . q/r2 | |
| 9. |
Electric flux linked with a surface will be maximum when |
| A. | The surface is held parallel to the electric field |
| B. | The surface is held perpendicular to the electric field |
| C. | The surface makes an angle of 45?with the field |
| D. | All of the above |
| Answer» C. The surface makes an angle of 45?with the field | |
| 10. |
Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will |
| A. | Decrease |
| B. | Increase |
| C. | Remain constant |
| D. | Depends upon composition of dielectric |
| Answer» B. Increase | |
| 11. |
Electric intensity at infinite distance from the point charge is |
| A. | Zero |
| B. | Infinite |
| C. | Positive |
| D. | Negative |
| Answer» B. Infinite | |
| 12. |
Electric intensity being a vector quantity always points |
| A. | Along the direction of force experienced by a unit positive charge |
| B. | Opposite to the direction of force experienced by a unit positive charge |
| C. | Perpendicular to the direction of force experienced by a uit positive charge |
| D. | Any of above |
| Answer» B. Opposite to the direction of force experienced by a unit positive charge | |
| 13. |
Equivalent capacitance is greater than individual capacitances in |
| A. | Series combination |
| B. | Parallel combination |
| C. | Both series and parallel combinations |
| D. | None of above |
| Answer» C. Both series and parallel combinations | |
| 14. |
If free space between the plates of a capacitor is replaced by a dielectric |
| A. | The potential difference remains constant capacittance and energy stored increases |
| B. | The potential difference remains constant capacittance decreases and energy increases |
| C. | The potential difference decreases but both capacitance and energy increase |
| D. | Both potential difference and capacitance decrease but energy increases |
| Answer» D. Both potential difference and capacitance decrease but energy increases | |
| 15. |
The variation of electric potential due to a point charge with distance is represented by the graph |
| A. | D |
| Answer» A. D | |
| 16. |
Tick the only wrong statement. |
| A. | Similar charges repel each other |
| B. | Dissimilar charges attract each other |
| C. | Repulsion is the sure test of electrification |
| D. | An electrically neutral body is repelled both positively and negatively charged bodies |
| Answer» E. | |
| 17. |
In a charged capacitor the energy resides in |
| A. | Magnetic hield |
| B. | Electric field |
| C. | Nuclear field |
| D. | Gravitational field |
| Answer» C. Nuclear field | |
| 18. |
Three capacitors C1 C2 and C3 are connected in parallel as in the Fig. The equivalent capacitance will be |
| A. | 8?F |
| B. | 0.8?F |
| C. | 1?F |
| D. | 16?F |
| Answer» B. 0.8?F | |
| 19. |
Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be |
| A. | Positively charged |
| B. | Electrically neutral |
| C. | Negatively charged |
| D. | Positively and negatively charged |
| Answer» C. Negatively charged | |
| 20. |
Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become |
| A. | 1/4th of its original value |
| B. | 1/8th of its original value |
| C. | 4 times of its original value |
| D. | 8 times of its original value |
| Answer» D. 8 times of its original value | |
| 21. |
Two similar charges each of one coulomb placed in air one meter apart repel each other with a force |
| A. | 9 x 109N |
| B. | 9.2 x 104N |
| C. | 9 x 109N |
| D. | 9 x 107N |
| Answer» B. 9.2 x 104N | |
| 22. |
When we rub a glass rod with a silk cloth then |
| A. | Glass rod acquires negative charge while silk acquires positive charge |
| B. | Glass rod acquires positive charge while silk acquires negative charges |
| C. | Both glass rod and silk acquire negative charge |
| D. | Both glass rod and silk acquire positive charge |
| Answer» C. Both glass rod and silk acquire negative charge | |
| 23. |
Value of ?r for various dielectrics is always |
| A. | Less than unity |
| B. | Equal to unit |
| C. | Larger than unit |
| D. | No hard and fast rule |
| Answer» D. No hard and fast rule | |
| 24. |
Equipotential planes are |
| A. | Parallel to one another |
| B. | Non parallel to one another |
| C. | Intersecting |
| D. | Circular |
| Answer» B. Non parallel to one another | |
| 25. |
In a non-uniform electric field a polar molecule will experience |
| A. | Net torque |
| B. | Net force |
| C. | Both series and parallel combinations |
| D. | Zero |
| Answer» D. Zero | |
| 26. |
N/C = |
| A. | V/A |
| B. | J/V |
| C. | V/m |
| D. | A/m |
| Answer» D. A/m | |
| 27. |
Potential difference is the work done in moving unit positive charge form one point to another |
| A. | In the direction of electric intensity |
| B. | Against electric intensity |
| C. | In any direction |
| D. | In the direction of electric flux |
| Answer» C. In any direction | |
| 28. |
SI unit of permitivity of free space is |
| A. | Nm2C2 |
| B. | N-1mC-2 |
| C. | NmC-1 |
| D. | N-1m-2C2 |
| Answer» E. | |
| 29. |
The electric lines of force are |
| A. | Imaginary |
| B. | Physically existing every where |
| C. | Physically existing near the charges |
| D. | Depends upon case |
| Answer» B. Physically existing every where | |
| 30. |
The force per unit charge is know as |
| A. | Electric flux |
| B. | Electric intensity |
| C. | Electric potential |
| D. | All of above are same |
| Answer» C. Electric potential | |
| 31. |
The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8C. If the spheres are connected by a copper wire |
| A. | Charge will flow from A to B |
| B. | Charge will flow from B to A |
| C. | No flow of charge will occur |
| D. | Both a and b are possible |
| Answer» B. Charge will flow from B to A | |
| 32. |
The minimum charge on any object cannot be less than |
| A. | 1.6 x 10-19C |
| B. | 3.2 x 10-19C |
| C. | 9.1 x 109C |
| D. | No definite value exist |
| Answer» B. 3.2 x 10-19C | |
| 33. |
The number of electrons in one coulomb charge is equal to |
| A. | 6.2 x 1018 |
| B. | 1.6 x 1019 |
| C. | 6.2 x 1021 |
| D. | 1.6 x 10-27 |
| Answer» B. 1.6 x 1019 | |
| 34. |
The value of the capacitance depends upon the |
| A. | Voltage applied |
| B. | Thickness of the capacitor plates |
| C. | Geometry of the capacitor |
| D. | Dinsity of the capacitor plates |
| Answer» D. Dinsity of the capacitor plates | |