## NIFTEM-Electronic Engineering ENG 122- End Semester Question Paper Jun 2017- 2nd Sem

*The information shared below is only to get a rough idea of NFTEM’s end semester question paper pattern. However, questions proportion from the syllabus topics may vary every semester.*

**Important points-**

- Time- 3:00 hours
- Total Marks- 100
- Three parts A, B & C, in which Part A is compulsory of (30 marks) having Objective questions, MCQs, Fill in the blanks and matching type questions. Students have to answer the questions from Part-A on the paper itself. Time allotted for Part-A is 40 minutes
- Part B & part C consists of 40 marks and 30 marks respectively. Part B- 8 questions of 5 marks each & Part C- 3 Questions of 10 marks each. Time for Part-B and C is total of 2:20 hours.

**PART B **

### Answer any 8 questions from the following-

**1.** Explain the working of Zener diode as a voltage regulator.

**2.** Perform the conversions-

(a) (256.12)_{8 }→ ( )_{10}

(b) (1011.00)_{2}→ ( )_{16}

(c) (5CB)_{16} → ( )_{10}

**3.** Draw and explain BJT Common emitter configuration.

**4.** Describe the *current-voltage characteristics* of p- channel JFET.

**5.** Explain the working principle of SCR.

**6.** Differentiate between DIAC and TRIAC.

**7.** Minimize the following function using K-Map.

F= A’. B’. C’. D’ + A’. B. C’. D + A’. B’. C. D’ + A. B’. C. D’ + A’. B. C’. D’ + A’. B’. C’. D

**8. **Explain the working of D flip flop.

**9.** Calculate the output voltage from the circuit for an input of 120µ.

**10.** Calculate the output voltage from the circuit. the inputs are V_{2}= 50mV and V_{1}= 10mV ?

**PART C**

### Answer any 3 questions from the following-

**1.** Determine Vo for the following network for the input indicated. Assume ideal diode.

**2.** Explain the characteristics and construction of n- channel JFET.

**3.** Describe the construction, operation, and characteristics of DIAC.

**4.** Design a combinatorial circuit to convert 4 bit binary data to Gray code.

**5.** Calculate the output voltage (Vo) using the circuit for values Rf= 470KΩ, R1= 4.7KΩ, R3= 47KΩ, and R3= 47KΩfor an input of 80mV.

*Best of Luck !!*

See other papers

NIFTEM-Basic Chemistry- End Semester Question Paper Dec 2019- 1st year

NIFTEM-Basic Electrical Engineering- End Semester Question Paper Dec 2019- 1st year

NIFTEM-Physics- End Semester Question Paper Dec 2019- 1st year

*Source- Question Papers collected by Soumen Roy*