MCQOPTIONS
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MCQOPTIONS
This section includes 110 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 carbon resistor contains_____________? |
| A. | carbon crystals |
| B. | solid carbon granules |
| C. | pulverized coal |
| D. | finely divided carbon black |
| Answer» E. | |
| 2. |
_______ is an example of piezoelectric material. |
| A. | lass |
| B. | uartz |
| C. | orrundum |
| D. | eoprene |
| Answer» C. orrundum | |
| 3. |
Which of the following is an advantage of stranded conductor over equivalent single conductor ? |
| A. | ess liability to kink |
| B. | reater flexibility |
| C. | ess liability to break |
| D. | ll of the above |
| Answer» E. | |
| 4. |
If the resistance of a conductor does not vary in accordance with Ohm’s law it is known as |
| A. | on-linear conductor |
| B. | everse conductor |
| C. | ad-conductor |
| D. | on-conductor |
| Answer» B. everse conductor | |
| 5. |
Due to which of the following reasons aluminium does not corrode in atmosphere ? |
| A. | luminium is a noble metal |
| B. | tmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium |
| C. | o reaction with oxygen occurs ft Any of the above |
| D. | ll of the above |
| Answer» C. o reaction with oxygen occurs ft Any of the above | |
| 6. |
Which of the following high resistance materials has the highest operating temperature ? |
| A. | anthal |
| B. | anganin |
| C. | ichrome |
| D. | ureka |
| Answer» B. anganin | |
| 7. |
For a particular material the Hall coefficient was found to be zero. The material is |
| A. | nsulator |
| B. | etal |
| C. | ntrinsic semiconductor |
| D. | one of the above |
| Answer» C. ntrinsic semiconductor | |
| 8. |
_______ has zero temperature co-efficient of resistance. |
| A. | luminium |
| B. | arbon |
| C. | orcelain |
| D. | anganin |
| Answer» E. | |
| 9. |
For germanium the forbidden energy gap is |
| A. | .15 eV |
| B. | .25 eV |
| C. | .5eV |
| D. | .7eV |
| Answer» E. | |
| 10. |
Most of the common metals have _________ structure. |
| A. | inear |
| B. | exagonal |
| C. | rthorhombic |
| D. | ubic |
| Answer» E. | |
| 11. |
The minority carrier concentration is largely a function of |
| A. | orward biasing voltage |
| B. | everse biasing voltage |
| C. | emperature |
| D. | he amount of doping |
| Answer» D. he amount of doping | |
| 12. |
Which of the following materials is used for making coils of standard resistances ? |
| A. | opper |
| B. | ichrome |
| C. | latinum |
| D. | anganin |
| Answer» E. | |
| 13. |
Selenium is _____ semiconductor. |
| A. | xtrnisic |
| B. | ntmisic |
| C. | -type |
| D. | -type |
| Answer» C. -type | |
| 14. |
_______ is a hard solder. |
| A. | in-lead |
| B. | in-silver-lead |
| C. | opper-zinc |
| D. | one of the above |
| Answer» D. one of the above | |
| 15. |
Carbon electrodes are not used in |
| A. | LS lamps |
| B. | lectric arc furnace |
| C. | ry cells |
| D. | inema projectors |
| Answer» B. lectric arc furnace | |
| 16. |
A good electric contact material should have all of the following properties except |
| A. | igh resistivity |
| B. | igh resistance to corrosion |
| C. | ood thermal conductivity |
| D. | igh melting point |
| Answer» B. igh resistance to corrosion | |
| 17. |
_________ is most commonly used for making magnetic recording tape |
| A. | ilver nitrate |
| B. | erric oxide |
| C. | mall particles of iron |
| D. | ilicon-iron |
| Answer» C. mall particles of iron | |
| 18. |
The photo-electric effect occurs only when the incident light has more than a certain critical |
| A. | ntensity |
| B. | peed |
| C. | requency |
| D. | ave length |
| Answer» D. ave length | |
| 19. |
Which of the following resistive materials has the lowest temperature co-efficient of resistance ? |
| A. | ichrome |
| B. | onstantan |
| C. | anthal |
| D. | olybdenum |
| Answer» B. onstantan | |
| 20. |
The tiny block formed by the arrangement of a small group of atoms is called the |
| A. | nit cell |
| B. | pace lattice |
| C. | ither A or B |
| D. | one of the above |
| Answer» B. pace lattice | |
| 21. |
Piezoelectric materials serve as a source of ________ . |
| A. | esonant waves |
| B. | usical waves |
| C. | icrowaves |
| D. | ltrasonic waves |
| Answer» E. | |
| 22. |
Is the property of absorbing moisture from atmosphere.%! |
| A. | Solubility |
| B. | Viscosity |
| C. | Porosity |
| D. | Hygroscopicity |
| Answer» C. Porosity | |
| 23. |
Commonly used conducting materials are%! |
| A. | Copper |
| B. | Aluminium |
| C. | Both A and B |
| D. | Copper and silver |
| E. | Platinum and gold |
| Answer» E. Platinum and gold | |
| 24. |
Which of the following are non-conductors of electricity?%! |
| A. | Non-metal solids except carbon |
| B. | Air and most other gases |
| C. | Pure water and liquids in general except mercury |
| D. | All of the above |
| Answer» D. All of the above | |
| 25. |
Which of the following variety of copper has the best conductivity ?%! |
| A. | Induction hardened copper |
| B. | Hard drawn copper |
| C. | Pure annealed copper |
| D. | Copper containing traces of silicon |
| Answer» D. Copper containing traces of silicon | |
| 26. |
Carbon rods are used in wet and dry cells because%! |
| A. | Carbon rod serves as conductor |
| B. | Carbon can resist the attack of battery acid |
| C. | Both A and B |
| D. | Either A or B |
| Answer» D. Either A or B | |
| 27. |
Non-linear resistors%! |
| A. | Produce harmonic distortion |
| B. | Follows Ohm’s law at low temperatures only |
| C. | Result in non-uniform heating |
| D. | None of the above |
| Answer» B. Follows Ohm‚Äö√Ñ√¥s law at low temperatures only | |
| 28. |
Solder is an alloy of%! |
| A. | Copper and aluminium |
| B. | Tin and lead |
| C. | Nickel, Copper and zinc |
| D. | Silver, copper and lead |
| Answer» C. Nickel, Copper and zinc | |
| 29. |
Which of the following resistive materials has the lowest temperature co-efficient of resistance ?%! |
| A. | Nichrome |
| B. | Constantan |
| C. | Kanthal |
| D. | Molybdenum |
| Answer» B. Constantan | |
| 30. |
In conductors conduction of electricity takes place due to movement of%! |
| A. | Electrons only |
| B. | Positive ions only |
| C. | Negative ions only |
| D. | Positive and negative ions |
| Answer» B. Positive ions only | |
| 31. |
For a particular material the Hall coefficient was found to be zero. The material is%! |
| A. | Insulator |
| B. | Metal |
| C. | Intrinsic semiconductor |
| D. | None of the above |
| Answer» C. Intrinsic semiconductor | |
| 32. |
________ has the best damping properties.%! |
| A. | Diamond |
| B. | High speed steel |
| C. | Mild steel |
| D. | Cast iron |
| Answer» E. | |
| 33. |
Selenium is _____ semiconductor.%! |
| A. | Extrnisic |
| B. | Intmisic |
| C. | N-type |
| D. | P-type |
| Answer» C. N-type | |
| 34. |
The minority carrier concentration is largely a function of%! |
| A. | Forward biasing voltage |
| B. | Reverse biasing voltage |
| C. | Temperature |
| D. | The amount of doping |
| Answer» D. The amount of doping | |
| 35. |
For germanium the forbidden energy gap is%! |
| A. | 0.15 eV |
| B. | 0.25 eV |
| C. | 0.5eV |
| D. | 0.7eV |
| Answer» E. | |
| 36. |
Constantan contains%! |
| A. | Silver and tin |
| B. | Copper and tungsten |
| C. | Tungsten and silver |
| D. | Copper and nickel |
| Answer» E. | |
| 37. |
*$_Which of the following variety of copper has the best conductivity ?? |
| A. | Induction hardened copper |
| B. | Hard drawn copper |
| C. | Pure annealed copper |
| D. | Copper containing traces of silicon |
| Answer» D. Copper containing traces of silicon | |
| 38. |
*/*_Steel wire is used as? |
| A. | Overhead telephone wire |
| B. | Earth wire |
| C. | Core wire of ACSR |
| D. | All of the above |
| Answer» E. | |
| 39. |
*/*_If the resistance of a conductor does not vary in accordance with Ohm’s law it is known as? |
| A. | non-linear conductor |
| B. | reverse conductor |
| C. | bad-conductor |
| D. | non-conductor |
| Answer» B. reverse conductor | |
| 40. |
*/*_The transition temperature of mercury is? |
| A. | 18.0°K |
| B. | 9.22°K |
| C. | 4.12°K |
| D. | 1.14’K |
| Answer» D. 1.14‚Äö√Ñ√¥K | |
| 41. |
*/*_Which of the following resistive materials has the lowest temperature co-efficient of resistance ?? |
| A. | Nichrome |
| B. | Constantan |
| C. | Kanthal |
| D. | Molybdenum |
| Answer» B. Constantan | |
| 42. |
*/*_Solder is an alloy of? |
| A. | Copper and aluminium |
| B. | Tin and lead |
| C. | Nickel, Copper and zinc |
| D. | Silver, copper and lead |
| Answer» C. Nickel, Copper and zinc | |
| 43. |
*/*_Carbon rods are used in wet and dry cells because? |
| A. | Carbon rod serves as conductor |
| B. | Carbon can resist the attack of battery acid |
| C. | Both A and B |
| D. | Either A or B |
| Answer» D. Either A or B | |
| 44. |
*/*_Non-linear resistors? |
| A. | Produce harmonic distortion |
| B. | Follows Ohm’s law at low temperatures only |
| C. | Result in non-uniform heating |
| D. | None of the above |
| Answer» B. Follows Ohm‚Äö√Ñ√¥s law at low temperatures only | |
| 45. |
*/*_Selenium is _____ semiconductor.? |
| A. | Extrnisic |
| B. | Intmisic |
| C. | N-type |
| D. | P-type |
| Answer» C. N-type | |
| 46. |
*/*_________ has the best damping properties.? |
| A. | Diamond |
| B. | High speed steel |
| C. | Mild steel |
| D. | Cast iron |
| Answer» E. | |
| 47. |
*/*_For a particular material the Hall coefficient was found to be zero. The material is? |
| A. | Insulator |
| B. | Metal |
| C. | Intrinsic semiconductor |
| D. | None of the above |
| Answer» C. Intrinsic semiconductor | |
| 48. |
*/*_In conductors conduction of electricity takes place due to movement of? |
| A. | Electrons only |
| B. | Positive ions only |
| C. | Negative ions only |
| D. | Positive and negative ions |
| Answer» B. Positive ions only | |
| 49. |
*/*_Constantan contains? |
| A. | Silver and tin |
| B. | Copper and tungsten |
| C. | Tungsten and silver |
| D. | Copper and nickel |
| Answer» E. | |
| 50. |
*/*_For germanium the forbidden energy gap is? |
| A. | 0.15 eV |
| B. | 0.25 eV |
| C. | 0.5eV |
| D. | 0.7eV |
| Answer» E. | |