electrical engineering MCQs – Page 323

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 Review each marked answer and report any item that may be outdated or unclear.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

6441. Two 1.2 k? resistors are in series and this series combination is in parallel with a 3.3 k? resistor. The total resistance is____________?
0

A. 5,700 ?

B. 138 ?

C. 880 ?

D. 1,389 ?

6442. A balanced Wheatstone bridge consists of an RV of 3,500 ?, an R2 of 200 ?, and an R3 of 680 ?. The value of RUNK is____________?
0

A. 680 ?

B. 880 ?

C. 1,029 ?

D. 200 ?

6443. A 12 k? resistor, a 15 k? resistor, and a 22 k? resistor are in series with two 10 k? resistors that are in parallel. The source voltage is 75 V. Current through the 15 k? resistor is approximately___________?
0

A. 5 mA

B. 1.4 mA

C. 14 mA

D. 50 mA

6444. On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
0

A. 500 V

B. 1,000 V

C. 50 V

D. 1 V

6445. A certain circuit is composed of two parallel resistors. The total resistance is 1,403 ?. One of the resistors is 2 k?. The other resistor value is____________?
0

A. 4.7 k?

B. 1,403 ?

C. 2 k?

D. 3,403 ?

6446. For frequencies above the resonant frequency, a parallel LC circuit behaves as a ____________ load?
0

A. Capacitive

B. Inductive

C. None of the above

D. Resistive

6447. When either L or C is increased, the resonant frequency of LC circuit ____________?
0

A. Insufficient data

B. Decreases

C. Increases

D. Remains the same

6448. The Q of a tuned circuit refers to the property of_______________?
0

A. Selectivity

B. None of the above

C. Fidelity

D. Sensitivity

6449. At parallel resonance, the phase angle between the applied voltage and circuit current is _____________?
0

A. None of the above

B. 180o

C. 0o

D. 90o

6450. Frequencies above ______________ kHz are called radio frequencies?
0

A. 200

B. 10

C. 50

D. 2

6451. At series or parallel resonance, the circuit behaves as a ______________ load?
0

A. Resistive

B. None of the above

C. Capacitive

D. Inductive

6452. For frequencies above the resonant frequency , a series LC circuit behaves as a ____________load?
0

A. Inductive

B. Resistive

C. Capacitive

D. None of the above

6453. In parallel resonance, there is _______________?
0

A. Both voltage and current amplification

B. Voltage amplifications

C. Current amplification

D. None of the above

6454. The Q of an LC circuit is given by _________________?
0

A. 2pfr x R

B. R2/2pfrL

C. R / 2pfrL

D. 2pfrL / R

6455. In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________________?
0

A. Is lowered

B. Remains the same

C. None of the above

D. Is raised

6456. A tuned amplifier is generally operated in ____________operation?
0

A. Class A

B. Class B

C. Class C

D. None of the above

6457. If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling?
0

A. None of the above

B. Loose

C. Critical

D. Tight

6458. In series resonance, there is__________________?
0

A. Voltage amplification

B. Current amplification

C. Both voltage and current amplification

D. None of the above

6459. At parallel resonance, the ratio L/C is ______________?
0

A. Zero

B. None of the above

C. Small

D. Very large

6460. If the resistance of a tuned circuit is increased, the Q of the circuit _______________?
0

A. Is decreased

B. Is increased

C. None of the above

D. Remains the same

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