University Questions with Answers (Long Answered Questions)

University Questions with Answers (Long Answered Questions)

Dec.09

Q.1 Draw and explain the V-I characteristics of a PN junction diode. [Section 1.8] [6]

Q.2 Explain the operation of FWR with centre tap transformer with neat circuit diagram. Also derive the following for this rectifier : i) dc output voltage ii) dc output current Hi) RMS output voltage iv) Ripple factor v) Peak inverse voltage [Section 1.16]         [16]

Q.3 Discuss the working principle, construction, characteristics and applications of LED in detail.

[Section 1.19]       [8]

Q.4 Explain the working of a zener diode as a shunt regulator. [Section 1.24]     [8]

May - 10

Q.5 With a neat diagram explain the working of a PN junction diode in forward bias condition.

[Section 1.6]         [5]

 Q.6 With a neat diagram explain the working of a PN junction diode in reverse bias condition.

[Section 1.7]         [5]

Q.7 Draw the circuit diagram and explain the working of full wave bridge rectifier and derive the expression for average output current, rectification efficiency, peak inverse voltage and TUF.

[Section 1.17]       [8]

Q.8 Explain V-I characteristics of zener diode.

[Section 1.22]       [8]

Dec.-10

Q.9 Explain the operation of FWR with centre tap transformer with neat circuit diagram. Also derive the following for this rectifier : i) dc output voltage ii) dc output current iii) RMS output voltage iv) Ripple factor v) Peak inverse voltage [Section 1.16]         [16]

Q.10 Explain the working of a zener diode as a shunt regulator. [Section 1.24] [8]

May-11

11. Derive the p-n diode current equation.

[Section 1.10]

Q.12 What is half wave rectifier ? Explain the working principle with neat sketch. [Section 1.15]          [8]

Dec.-11

Q.13 Explain the operation of FWR with centre tap transformer with neat circuit diagram. Also derive the following for this rectifier : i) dc output voltage ii) dc output current iii) RMS output voltage iv) Ripple factor v) Peak inverse voltage [Section 1.16]         [16]

Q. 14 Draw the circuit diagram and explain the working of full wave bridge rectifier and derive the expression for average output current, rectification efficiency, peak inverse voltage and TUF. [Section 1.17]       [8]

Q. 15 Discuss the working principle, construction, characteristics and applications of LED in detail.

[Section 1.19]       [8]

May-12

Q. 16 What is drift current ? [Section 1.2]  [4]

Q. 17 What is diffusion current ? [Section 1.3]     [4]

Q. 18 Draw the circuit diagram of half-wave rectifier and explain it's operation with necessary waveform.

Also derive expression for rectification efficiency and transformer utilisation factor. [Section 1.15] [10]

Q.19 Explain the working of a zener diode as a shunt regulator. [Section 1.24]

Dec.-12

Q.20 With a neat diagram explain the working of a PN Junction diode in forward bias condition. [Section 1.6]

Q.21 With a neat diagram explain the working of a PN Junction diode in reverse bias condition.  [Section 1.7]

Q.22 Draw and explain the V-I characteristics of a PN Junction diode. [Section 1.8] [5]

Q.23 List and explain the applications of LED.

[Section 1.20]

May-13

Q.24 What is drift current ? [Section 1.2]

Q.25 What is diffusion current ? [Section 1.3]

Q.26 Explain the working of a zener diode as a shunt regulator. [Section 1.24]

Dec.-13

Q.27 Explain the working of pn junction diode and its V-I characteristics. [Section 1,8]

Q.28 Explain the operation of FWR with centre top transformer with neat circuit diagram. Also derive the following for this rectifier: 1) dc output voltage 11) de output current ) RMS output voltage iv) Ripple factor } Peak inverse voltage

[Section 1,16]

Q.29 Narrate the operation of a zener diode. [Section 1.22]

Q.30 Explain VI characteristics of sener [Section 1.22]

May-14

Q.31 Draw and explain the V-I characteristics of a PN Junction diode. [Section 1.8]

Q.32 Draw the croult diagram and explain the working of full wave bridge rectifier and dertue the expression for average output current, rectification efficiency, peak Inverse voltage and TUF. [Section 1.17] 闻

Q.33 Explain the working of a zener diode as a shunt regulator. [Section 1,24]

(Regulation 2013)

Dec.-14

Q.34 With a next diagram explain the working of a PN junction diode in forward blas condition [Section 1.6]

Q.35 Draw and explain the V-I characteristics of a PN junction diode. [Section 1.8] [6]

Q.36 With a neat diagram explain the working of a PN Junction diode in reverse blas condition. [Section 1.7]

Q.37 Explain the working of pn junction diode and its V-I characteristics. [Section 1.8]

Q.38 Draw the circuit diagram and explain the working of full wave bridge rectifier and derive the expression for average output current, rectification efficiency, peak inverse voltage and TUF. [Section 1.17]

May-15

Q.39 Explain the working of a zener diode as a shunt regulator. [Section 1.24]

0,40 What is laser diode ? Explain its construction and working principle. [Section 1.21]

Q.41 Prove that the ripple factor for the full-wave rectifier circuit is 0.48. [Section 1.16]

Dec.-15

Q.42 With a neat diagram explain the working of a PN Junction diode in forward blas condition.

[Section 1,6]

Q.43 With a neat diagram explain the working of a PN junction diode in reverse blas condition. [Section 1.7]

Q.44 What is half wave rectifier? Explain the working principle with neat sketch. [Section 1.15]

Q.45 Draw and explain the V-I characteristics of a sener diode. What are the too breakdown mechanisms in a sener diode ? [Section 1.22]

Q.46 Differentiate between rener breakdown and avalanche breakdown. [Section 1.22]

May-16

Q,47 Explain the VI characteristics of PN junction diode. [Section 1.8]

Q.48 Explain the V characteristics of Zener diode. [Section 1,22,1]

Q.49 Briefly discuss the following terms :

i) Transition and diffusion capacitance

[Sections 1.11 and 1.12]

ii) Temperature effect on PN junction

[Section 1.8.2]

iii) Laser Diode [Section 1.21] [6 + 5 + 5]

Dec.-16

Q.50 Derive the expression of the Space charge or Transition capacitance of PN diode under reuerse bias with a neat diagram. [Section 1.11.1]         [13]

Q.51 Explain the operation of a Half wave rectifier and derive its various parameters. [Section 1.15] [13]

May -17

Q.52 Draw the circuit diagram and explain the working of full wave bridge rectifier with output filter and derive the expression of average output current and ripple factor. (Sections 1.16.3, 1.16.5 and 1.17)   [13]

Q.53 Derive the expression for diffusion capacitance of PN junction diode. (Section 1.12.1)    [7]

Q.54 Explain how zener diode can be acts as a voltage regulator. (Section 1.24) [6]

Dec. -17

Q.55 Explain the working of a bridge rectifier circuit. Discuss its advantages over centre-tap full wave rectifier circuit. (Sections 1.17.1 and 1.17.8) [7]

Q.56 Explain the working, advantages and applications of LED and laser diodes. (Sections 1.19 and 1.21)    [10]

Q.57 There is an application which needs the output voltage to be regulated. Choose an appropriate diode/device, that would ensure this operation with appropriate circuit, describe how it regulates voltage. Consider a specific example, design the circuit with appropriate values of components involved. State the important constraints that need to be considered. (Section 1.24) [15]

(Regulation 2017)

Dec. -18

Q.58 Explain the working of a bridge rectifier.

(Section 1.17)       [6]