electrical engineering MCQs – Page 292

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 Review each marked answer and report any item that may be outdated or unclear.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

5821. If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes______________?
0

A. 0.8 ohm

B. 1.0 ohm

C. 0.4 ohm

D. 0.6 ohm

5822. The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?
0

A. 18 Q

B. 64 Q

C. 36 Q

D. 48 Q

5823. The property of a conductor due to which it passes current is called___________?
0

A. reluctance

B. inductance

C. resistance

D. conductance

5824. Insulating materials have the function of___________?
0

A. conducting very large currents

B. preventing an open circuit between the voltage source and the load

C. storing very high currents

D. preventing a short circuit between conducting wires

5825. The filament of an electric bulb is made of______________?
0

A. tungsten

B. carbon

C. aluminium

D. nickel

5826. Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across______________?
0

A. none of them

B. Ri

C. Rl

D. either Rl or Ri

5827. In a series circuit with unequal resistances______________?
0

A. the lowest resistance has the highest current

B. the highest resistance has the most of the current through it

C. the lowest resistance has the highest voltage drop

D. the highest resistance has the highest voltage drop

5828. Which of the following quantities consists of SI unit as WATT ?
0

A. Power

B. Current

C. Charge

D. Force

5829. Out of the following which is an insulating material____________?
0

A. Paper

B. Copper

C. Gold

D. Silver

5830. Current velocity through a copper conductor is___________?
0

A. the same as propagation velocity of electric energy

B. independent of current strength

C. nearly 3 x 108 m/s

D. of the order of a few ^.s/m

5831. Insulating materials have the function of______________?
0

A. preventing an open circuit between the voltage source and the load

B. conducting very large currents

C. preventing a short circuit between conducting wires

D. storing very high currents

5832. If P is the power of a star connected system then what will be power of an equivalent delta connected system?
0

A. 3P

B. P/3

C. None of the above

D. P

5833. Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________?
0

A. there will be heavy current in the main line

B. rest of the two bulbs will not light

C. the other two bulbs will light

D. all three bulbs will light

5834. A closed switch has a resistance of_____________?
0

A. about 50 ohms

B. zero

C. about 500 ohms

D. infinity

5835. Which quantity should be measured by the voltmeter ?
0

A. Current

B. Power

C. Speed

D. Voltage

5836. The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?
0

A. 1.8 x 10?8 Q-m

B. 1.6 x 10?8 Q-m

C. 1.2 x 10~8 Q-m

D. 1.4 x 10~8 Q-m

5837. Capacitor does not allow the sudden change of ?
0

A. None of the above

B. power

C. current

D. voltage

5838. If a parallel circuit is opened in the main line, the current_______________?
0

A. is zero in all branches

B. increases in the branch of the lowest resistance

C. increases in each branch

D. is zero in the highest resistive branch

5839. Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes__________?
0

A. 9 times

B. 1/9 times

C. unchanged

D. 3 times

5840. When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will___________?
0

A. remain constant

B. none of the above

C. decrease

D. increase

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