electrical engineering Mcqs
1. economics of power generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
5451. The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ______________?
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A. 1000:01:00

B. 40,000 : 1

C. 1:01

D. 100:01:00

5452. A zener diode is always_______________ connected?
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A. reverse

B. none of the above

C. forward

D. either reverse or forward

5453. _____________ filter circuit results in the best voltage regulation?
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A. none of the above

B. resistance input

C. capacitor input

D. choke input
5454. A zener diode is________________ device?
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A. a linear

B. none of the above

C. an amplifying

D. a non-linear
5455. The forward voltage drop across a silicon diode is about _______________?
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A. 0.7 V

B. 3 V

C. 10 V

D. 2.5 V

5456. There is a need of transformer for__________________?
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A. centre-tap full-wave rectifier

B. none of the above

C. half-wave rectifier

D. bridge full-wave rectifier

5457. A 1,000 V power supply would use_____________ as a filter capacitor?
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A. air capacitor

B. paper capacitor

C. electrolytic capacitor

D. mica capacitor

5458. The disadvantage of a half-wave rectifier is that the__________________?
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A. components are expensive

B. none of the above

C. output is difficult to filter

D. diodes must have a higher power rating

5459. The PIV rating of a crystal diode is _______________ that of equivalent vacuum diode
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A. none of the above

B. more than

C. lower than

D. the same as

5460. If temperature changes, h parameters of a transistor ________________?
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A. Do not change

B. None of the above

C. Also change

D. May or may not change

5461. The hfe parameter is called ______________in CE arrangement with output shorted?
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A. Input impedance

B. Voltage gain

C. Current gain

D. None of the above

5462. If the operating point changes, the h parameters of transistor_____________?
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A. Do not change

B. None of the above

C. May or may not change

D. Also change
5463. The dimensions of hie parameter are _______________?
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A. Farad

B. None of the above

C. Mho

D. Ohm
5464. A transistor behaves as a linear device for _____________?
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A. Small signals only

B. Large signals only

C. Both small and large signals

D. None of the above

5465. Hybrid means_____________?
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A. Unique

B. Mixed

C. Single

D. None of the above

5466. The parameter hie stands for input impedance in _____________?
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A. CC arrangement with output shorted

B. None of the above

C. CE arrangement with output shorted

D. CB arrangement with output shorted

5467. In CE arrangement, the value of input impedance is approximately equal to ______________?
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A. Hre

B. Hie

C. Hoe

D. None of the above

5468. In order to determine hfe and hie parameters of a transistor, __________ is an a.c. short-circuited?
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A. Input

B. Input as well as output

C. Output

D. None of the above

5469. The values of h parameter of a transistor in CE arrangement are ____________ arrangement?
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A. Different from that in CB

B. None of the above

C. The same as for CB

D. The same as for CC

5470. The h parameter approach gives correct results for_______________?
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A. Large signals only

B. Small signals only

C. Both small and large signals

D. None of the above

5471. There are ______________ h parameters of a transistor?
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A. Two

B. Three

C. Four

D. None of the above

5472. NAND gates are preferred over others because these__________________?
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A. have lower fabrication area

B. consume least electronic power

C. can be used to make any gate

D. provide maximum density in a chip

5473. Which type of CPLD packaging can provide maximum number of pins on the package due to small size of the pins ?
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A. BGA

B. PGA

C. QFP

D. PLCC

5474. The only function of NOT gate is to__________________?
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A. Stop signal

B. Invert input signal

C. None of the above

D. Act as a universal gate

5475. In which of the following base systems is 123 not a valid number ?
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A. Base 16

B. Base 10

C. Base 3

D. Base8

5476. (1(10101)2 is_______________?
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A. ( 69)10

B. (37)10

C. (41 )10

D. (5)10

5477. When an input signal 1 is applied to a NOT gate, the output is ______________?
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A. Either 0 & 1

B. 0

C. None of the above

D. 1

5478. The universal gate is ________________?
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A. NAND gate

B. OR gate

C. AND gate

D. None of the above

5479. A debouncing circuit is________________?
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A. an astable MV

B. a bistable MV

C. a latch

D. a monostable MV

5480. An AND gate will function as OR if________________?
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A. all the inputs to the gates are 1

B. all the inputs are 0

C. all the inputs and outputs are complemented

D. either of the inputs is 1

5481. The inverter is _________________?
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A. one of the above

B. AND gate

C. NOT gate

D. OR gate

5482. A NAND gate is called a universal logic element because______________?
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A. many digital computers use NAND gates

B. it is used by everybody

C. any logic function can be realized by NAND gates alone

D. all the minization techniques are applicable for optimum NAND gate realization

5483. The number 1000 would appear just immediately after__________________?
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A. FFFF (hex)

B. 1111 (binary)

C. 7777 (octal)

D. All of the above

5484. In Boolean algebra, the bar sign (-) indicates__________________?
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A. NOT operation

B. AND operation

C. None of the above

D. OR operation

5485. The NOR gate is OR gate followed by____________________?
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A. None of the above

B. AND gate

C. NOT gate

D. NAND gate

5486. The NAND gate is AND gate followed by_________________?
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A. None of the above

B. AND gate

C. OR gate

D. NOT gate
5487. Digital circuit can be made by the repeated use of________________?
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A. NOT gates

B. OR gates

C. None of the above

D. NAND gates
5488. The number of Boolean functions that can be generated by n variables is equal to_________________?
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A. 2n

B. 22 n

C. 2n-1

D. 2n

5489. The fan put of a 7400 NAND gate is_______________?
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A. 10TTL

B. 8TTL

C. 5TTL

D. 2TTL

5490. The binary number 10101 is equivalent to decimal number_________________?
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A. 21

B. 27

C. 12

D. 19

5491. Which mechanism allocates the binary value to the states in order to reduce the cost of the combinational circuits ?
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A. State Evaluation

B. State Reduction

C. State Minimization

D. State Assignment
5492. An OR gate has 6 inputs. The number of input words in its truth table are________________?
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A. 64

B. 6

C. 128

D. 32

5493. Digital computers are more widely used as compared to analog computers, because they are______________?
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A. useful over wider ranges of problem types

B. easier to maintain

C. always more accurate and faster

D. less expensive

5494. The binary code of (21.125)10 is_______________?
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A. 10101.01

B. 10100.111

C. 10100.001

D. 10101.001
5495. In case of OR gate, no matter what the number of inputs, a____________________?
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A. 1 at any input causes the output to be at logic 1

B. 1 at any input causes the output to be at logic 0

C. 0 any input causes the output to be at logic 0

D. 0 at any input causes the output to be at logic 1

5496. Excess-3 code is known as_________________?
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A. Algebraic code

B. Weighted code

C. Cyclic redundancy code

D. Self-complementing code
5497. Consider the representation of six-bit numbers by twos complement, ones complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000 ?
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A. All three representations

B. Twos complement and ones complement only

C. Sign and magnitude and ones complement only

D. Twos complement only

5498. Indicate which of the following three binary additions are correct? 1.1011 + 1010 = 10101 II. 1010 + 1101 = 10111 ?
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A. I and II

B. II and III

C. . 1010 + 1101 = 11111

D. II and III

E. III only

5499. What would happen, if smaller logic modules are utilized for performing logical functions associated with FPGA? A. Propagation delay will increase B. FPGA area will increase C. Wastage of logic modules will not be prevented D. Number of interconnected paths in device will decrease ?
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A. A & D

B. B & C

C. A & B

D. C & D

5500. Which is the correct order of sequence for representing the input values in K-map ?
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A. (00, 01, 11, 10)

B. (00, 01, 10, 11)

C. (00, 10, 11, 01)

D. (00, 10, 01, 11)