Fundamentals of Electronics Engineering — Major (End Semester) 2021 question paper
MMMUT Electrical Engineering previous year question paper for Fundamentals of Electronics Engineering (BEC-101), semester 1, Major (End Semester) 2021. All 24 questions are listed below, each with a written answer on Nexsus.
Paper details
Subject: Fundamentals of Electronics Engineering (BEC-101)
Branch: Electrical Engineering
Semester: 1
Exam: Major (End Semester) 2021
Questions: 24
Questions asked in Fundamentals of Electronics Engineering Major (End Semester) 2021
Q1(a). Sketch the transfer characteristic of JFET? [2 marks]
Q1(b). Convert the decimal number 151.75 to binary. [2 marks]
Q1(c). How does avalanche breakdown differ from zener breakdown? [2 marks]
Q1(d). What is meant by fermi level in semiconductor? Where does the fermi level lie in an intrinsic semiconductor [2 marks]
Q1(e). Define dynamic resistance of a p-n junction diode in forward biased condition. [2 marks]
Q1(f). An op-amp has a common mode gain of 0.01 and a differential mode gain of 10^5, find the common mode rejection ratio (CMRR). [2 marks]
Q1(g). Explain the characteristics of an ideal operational amplifier. [2 marks]
Q2(a). Draw & explain the V-I characteristic of a P-N junction diode. How does the conductivity and resistivity of the semiconductor materials depend upon temperature? [5 marks]
Q2(b). Explain half wave rectifier with suitable diagram. A half-wave rectifier is used to supply 50V DC to a resistive load of 800 Ω. The diode has a resistance of 25 Ω. Calculate A.C voltage required. [5 marks]
Q2(c). Derive the relation between α and β for a transistor. For an npn transistor, α=0.995 and Ic=10m A. Find Iβ and Ic? [5 marks]
Q3(a). Explain the working of CB n-p-n Transistor configuration and draw input and output characteristics. Show that ICBO = ICEO/ (1-α) at IB= 0 [5 marks]
Q3(b). Find the transistor shown in circuit, whether it is in active region or in saturation region. [5 marks]
Q3(c). Explain the concept of DC load line of BJT. Why operating point must be in middle of Load line? [5 marks]
Q4(a). In the given circuit, calculate the values of: i. ID ii. VDS iii. VGG iv. VD v. VS [5 marks]
Q4(b). Explain the construction and working of n-type enhancement MOSFET and also Differentiate between BJT and FET. [5 marks]
Q4(c). Reduce the following function in SOP form using K-Map. F= Σ (0,1,2,3,7,8,10) + Σ (5,6,11,15) [5 marks]
Q5(a). For the op-amp shown, the output voltage Vo = 40 V1 - 39.8 V2. Find the CMRR value of op-amp. [5 marks]
Q5(b). Derive and explain the Integrator and Summing amplifier using OP-AMP. [5 marks]
Q5(c). Draw and explain the working of Digital Multimeter (DMM) and Digital Voltmeter (DVM) on the basis of block diagram. [5 marks]