electrical engineering MCQs – Page 294

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs

1. economics of power generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

5861. In the case of direct current____________?
0

A. magnitude and direction of current remains constant

B. magnitude and direction of current changes with time

C. magnitude of current remains constant

D. magnitude of current changes with time

5862. Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be_____________?
0

A. 160 ohms

B. 80 ohms

C. 20 ohms

D. 10 ohms

5863. If/, R and t are the current, resistance and time respectively, then according to Joules law heat produced will be proportional to_______________?
0

A. I2R2t

B. I2Rf

C. I2R2t*

D. I2Rt

5864. Which of the following quantities remain the same in all parts of a series circuit ____________?
0

A. Current

B. Voltage

C. Power

D. Resistance

5865. Temperature co-efficient of resistance is expressed in terms of___________?
0

A. ohms/C

B. mhos/ohmC

C. mhos/C

D. ohms/ohmC

5866. The insulation on a current carrying conductor is provided__________?
0

A. to prevent leakage of current

B. to prevent shock

C. both of above factors

D. none of above factors

5867. It becomes more difficult to remove_________________?
0

A. third electron from the orbit

B. any electron from the orbit

C. second electron from the orbit

D. first electron from the orbit

5868. Ohms law is not applicable to__________?
0

A. small resistors

B. D. C. circuits

C. semi-conductors

D. high currents

5869. In a lamp load when more than one lamp are switched on the total resistance of the load_____________?
0

A. remains same

B. increases

C. decreases

D. none of the above

5870. A substance whose molecules consist of dissimilar atoms is called____________?
0

A. compound

B. super-conducto

C. semi-conductor

D. insulator

5871. Which of the following statement is correct_______________?
0

A. A semi-conductor is a material whose conductivity is same as between that of a conductor and an insulator

B. A semi-conductor is a material made of alternate layers of conducting material and insulator

C. A semi-conductor is a material which has conductivity having average value of conductivity of metal and insulator

D. A semi-conductor is one which conducts only half of the applied voltage

5872. When electric current passes through a metallic conductor, its temperature rises. This is due to__________?
0

A. mutual collisions between metal atoms

B. mutual collisions between conducting electrons

C. the release of conduction electrons from parent atoms

D. collisions between conduction electrons and atoms

5873. When current flows through heater coil it glows but supply wiring does not glow because______________?
0

A. current through supply line flows at slower speed

B. supply wires are made of superior material

C. resistance of heater coil is more than the supply wires

D. supply wiring is covered with insulation layer

5874. One newton meter is same as_____________?
0

A. one watt

B. one joule second

C. five joules

D. one joule

5875. Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
0

A. 25:04:00

B. 2 : 5

C. 5:02

D. 4:25

5876. 1 angstrom is equal to______________?
0

A. 10-8 mm

B. 10?10 m

C. 10?6 cm

D. 10~14 m

5877. An open resistor, when checked with an ohm-meter reads_____________?
0

A. low but not zero

B. zero

C. infinite

D. high but within tolerance

5878. The condition for the validity under Ohms law is that_______________?
0

A. current should be proportional to the size of the resistance

B. resistance must be wire wound type

C. temperature at positive end should be more than the temperature at negative end

D. resistance must be uniform

5879. A rheostat differs from potentiometer in the respect that it_____________?
0

A. offers large number of tapping

B. has large number of turns

C. has higher wattage rating

D. has lower wattage rating

5880. Which method can be used for absolute measurement of resistances _______________?
0

A. Lorentz method

B. Releigh method

C. Ohms law method

D. Wheatstone bridge method

Previous Next

Showing 5861 to 5880 of 7381 mcqs