MCQOPTIONS
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MCQOPTIONS
This section includes 185 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A closed surface contains two equal and opposite charges. The net electric flux from the surface will be________________? |
| A. | negative |
| B. | positive |
| C. | zero |
| D. | data is insufficient |
| Answer» D. data is insufficient | |
| 2. |
A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy_______________? |
| A. | 200J |
| B. | 100J |
| C. | 1000J |
| D. | 100 eV |
| Answer» C. 1000J | |
| 3. |
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is___________? |
| A. | 0.024 F |
| B. | 0.12 F |
| C. | 0.6 F |
| D. | 0.8 F |
| Answer» B. 0.12 F | |
| 4. |
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is_____________? |
| A. | 0.024 F |
| B. | 0.12 F |
| C. | 0.6 F |
| D. | 0.8 F |
| Answer» B. 0.12 F | |
| 5. |
A capacitor is a perfect insulator for______________? |
| A. | direct current |
| B. | alternating current |
| C. | both for the direct and alternating current |
| D. | none of above |
| Answer» B. alternating current | |
| 6. |
A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is__________? |
| A. | 50 joules |
| B. | 150 joules |
| C. | 200 joules |
| D. | 250 joules |
| Answer» E. | |
| 7. |
A capacitor consists of_____________? |
| A. | two insulators separated by a conductor |
| B. | two conductors separated by an insulator |
| C. | two insulators only |
| D. | two conductors only |
| Answer» C. two insulators only | |
| 8. |
A capacitor consists of two____________? |
| A. | ceramic plates and one mica disc |
| B. | insulators separated by a dielectric |
| C. | silver-coated insulators |
| D. | conductors separated by an insulator |
| Answer» E. | |
| 9. |
A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be_____________? |
| A. | 10 F |
| B. | 10 uF |
| C. | 100 nF |
| D. | 1000 uF |
| Answer» C. 100 nF | |
| 10. |
A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is______________? |
| A. | 0.2 s |
| B. | 0.4 s |
| C. | 0.6 s |
| D. | 0.8 s |
| Answer» E. | |
| 11. |
A capacitance is a circuit component that opposes the change in circuit__________? |
| A. | Current |
| B. | Voltage |
| C. | impedance |
| D. | None of the above |
| Answer» C. impedance | |
| 12. |
A 5 μF 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 | |
| 13. |
A 25eV electron has a speed of______________? |
| A. | 2 x 106m/sec |
| B. | 3 x 106m/sec |
| C. | 5 x 106m/sec |
| D. | 4 x 106m/sec |
| Answer» C. 5 x 106m/sec | |
| 14. |
1 volt/meter is same as___________? |
| A. | 1 meter/coulomb |
| B. | 1 newton meter |
| C. | 1 newton/meter |
| D. | 1 joule/coulomb |
| Answer» D. 1 joule/coulomb | |
| 15. |
The capacity of capacitor bank used in power factor correction is expressed in terms of%! |
| A. | kW |
| B. | kVA |
| C. | kVAR |
| D. | volts |
| Answer» D. volts | |
| 16. |
When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of%! |
| A. | 2 joules |
| B. | 4 joules |
| C. | 6 joules |
| D. | 8 joules |
| Answer» E. | |
| 17. |
Permittivity is expressed in%! |
| A. | Farad/sq-m |
| B. | Farad/meter |
| C. | Weber/meter |
| D. | Weber/sq-m |
| Answer» C. Weber/meter | |
| 18. |
A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be%! |
| A. | 10 F |
| B. | 10 uF |
| C. | 100 nF |
| D. | 1000 uF |
| Answer» C. 100 nF | |
| 19. |
Out of the following capacitors of identical rating which one will have the smallest dimensions ?%! |
| A. | Aluminium foil capacitor |
| B. | Mica capacitor |
| C. | Ceramic capacitor |
| D. | Paper capacitor |
| Answer» D. Paper capacitor | |
| 20. |
A paper capacitor is usually available in the form of%! |
| A. | tubes |
| B. | rolled foil |
| C. | disc |
| D. | meshed plates |
| Answer» C. disc | |
| 21. |
Which is the most superior dielectric out of the following ?%! |
| A. | Air |
| B. | Glass |
| C. | Bakelite |
| D. | Paper |
| Answer» D. Paper | |
| 22. |
Mica capacitors are characterised by all of the following except%! |
| A. | stable operation |
| B. | accurate value |
| C. | low leakage reactance |
| D. | low losses |
| Answer» D. low losses | |
| 23. |
Dielectric strength of a medium is usually expressed in%! |
| A. | J/mm |
| B. | C/m² |
| C. | kV/mm |
| D. | N/mm |
| Answer» D. N/mm | |
| 24. |
1 volt/meter is same as%! |
| A. | 1 meter/coulomb |
| B. | 1 newton meter |
| C. | 1 newton/meter |
| D. | 1 joule/coulomb |
| Answer» D. 1 joule/coulomb | |
| 25. |
Which of the following is not a vector ?%! |
| A. | Linear momentum |
| B. | Angular momentum |
| C. | Electric field |
| D. | Electric potential |
| Answer» E. | |
| 26. |
The capacitor preferred for high frequency circuits is%! |
| A. | air capacitor |
| B. | mica capacitor |
| C. | electrolytic capacitor |
| D. | none of the above |
| Answer» C. electrolytic capacitor | |
| 27. |
The capacitance of a capacitor is not affected by%! |
| A. | distance between plates |
| B. | area of plates |
| C. | thickness of plates |
| D. | all of the above |
| Answer» D. all of the above | |
| 28. |
In the case of a lossy capacitor, its series equivalent resistance value will be%! |
| A. | small |
| B. | very small |
| C. | large |
| D. | zero |
| Answer» D. zero | |
| 29. |
The property of a capacitor to store electricity is called its%! |
| A. | capacitance |
| B. | charge |
| C. | energy |
| D. | none of the above |
| Answer» B. charge | |
| 30. |
In a capacitive circuit%! |
| A. | a steady value of applied voltage causes discharge |
| B. | an increase in applied voltage makes a capacitor charge |
| C. | decrease in applied voltage makes a capacitor charge |
| D. | none of the above |
| Answer» C. decrease in applied voltage makes a capacitor charge | |
| 31. |
For closer tolerances which of the following capacitors is usually preferred ?%! |
| A. | Paper capacitor |
| B. | Mica capacitor |
| C. | Ceramic disc capacitor |
| D. | None of the above |
| Answer» C. Ceramic disc capacitor | |
| 32. |
Dielectric strength of mica is%! |
| A. | 10 to 20 kV/mm |
| B. | 30 to 50 kV/mm |
| C. | 50 to 200 kV/mm |
| D. | 300 to 500 kV/mm |
| Answer» D. 300 to 500 kV/mm | |
| 33. |
Paper capacitors usually have a tolerance of%! |
| A. | ± 5% |
| B. | ± 10% |
| C. | ± 15% |
| D. | ± 20% |
| Answer» C. ¬¨¬± 15% | |
| 34. |
The potential gradient across the material of low permittivity is than across the material of high permittivity.%! |
| A. | smaller |
| B. | greater |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» C. both (A) and (B) | |
| 35. |
The lines of force due to charged particles are%! |
| A. | always straight |
| B. | always curved |
| C. | sometimes curved |
| D. | none of the above |
| Answer» C. sometimes curved | |
| 36. |
Which of the following material has least value of dielectric constant ?%! |
| A. | Ceramics |
| B. | Oil |
| C. | Glass |
| D. | Paper |
| Answer» C. Glass | |
| 37. |
What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?%! |
| A. | It will become magnetic |
| B. | It will melt |
| C. | It will get punctured or cracked |
| D. | Its molecular structure will get changed |
| Answer» D. Its molecular structure will get changed | |
| 38. |
The presence of an uncharged conductor near a charged one increases the%! |
| A. | charge of the charged conductor |
| B. | capacity of the charged conductor |
| C. | potential of the charged conductor |
| D. | all of the above |
| Answer» C. potential of the charged conductor | |
| 39. |
The force between two charges is 120 N. If the distance between the charges is doubled, the force will be%! |
| A. | 60 N |
| B. | 30 N |
| C. | 40 N |
| D. | 15 N |
| Answer» C. 40 N | |
| 40. |
Dielectric strength of medium%! |
| A. | increases with rise in temperature |
| B. | increases with moisture content |
| C. | is same for all insulating materials |
| D. | none of the above |
| Answer» E. | |
| 41. |
Which of the following capacitors can be used for temperature compensation ?%! |
| A. | Air capacitor |
| B. | Ceramic capacitor |
| C. | Paper capacitor |
| D. | None of the above |
| Answer» C. Paper capacitor | |
| 42. |
An electrolytic capacitor is generally made to provide%! |
| A. | low capacitance |
| B. | fixed capacitance |
| C. | variable capacitance |
| D. | large value of capacitance |
| Answer» E. | |
| 43. |
*$_If a third equal and similar charge is placed between two equal and similar charges, then this third charge will? |
| A. | move out of the field of influence of the two charges |
| B. | remain in stable equilibrium |
| C. | not be in equilibrium |
| D. | be in unstable equilibrium |
| Answer» C. not be in equilibrium | |
| 44. |
*$_A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be? |
| A. | 10 F |
| B. | 10 uF |
| C. | 100 nF |
| D. | 1000 uF |
| Answer» C. 100 nF | |
| 45. |
*$_A paper capacitor is usually available in the form of? |
| A. | tubes |
| B. | rolled foil |
| C. | disc |
| D. | meshed plates |
| Answer» C. disc | |
| 46. |
*$_Out of the following capacitors of identical rating which one will have the smallest dimensions ?? |
| A. | Aluminium foil capacitor |
| B. | Mica capacitor |
| C. | Ceramic capacitor |
| D. | Paper capacitor |
| Answer» D. Paper capacitor | |
| 47. |
*$_The property of a capacitor to store electricity is called its? |
| A. | capacitance |
| B. | charge |
| C. | energy |
| D. | none of the above |
| Answer» B. charge | |
| 48. |
*$_In the case of a lossy capacitor, its series equivalent resistance value will be? |
| A. | small |
| B. | very small |
| C. | large |
| D. | zero |
| Answer» D. zero | |
| 49. |
*$_The capacitance of a capacitor is not affected by? |
| A. | distance between plates |
| B. | area of plates |
| C. | thickness of plates |
| D. | all of the above |
| Answer» D. all of the above | |
| 50. |
*$_The capacitor preferred for high frequency circuits is? |
| A. | air capacitor |
| B. | mica capacitor |
| C. | electrolytic capacitor |
| D. | none of the above |
| Answer» C. electrolytic capacitor | |