H.T.
No: Course Code No: 23EE1T01
VISHNU INSTITUTE OF TECHNOLOGY (AUTONOMOUS)
I B. Tech I Semester (R23) Regular Examinations, Jan/ Feb – 2024
BASIC ELECTRICAL & ELECTRONICS ENGINEERING
(Common EEE, ME, ECE, AI & DS, AI & ML)
Time:3hours Max. Marks: 70M
Note:1. Question Paper consists of two parts (Part-A and Part-B)
2. Answer all the questions in Part-A
3. Answer either a or b questions from Question number 2 to 7
in Part-B
PART –A
1 BASIC ELECTRICAL ENGINEERING
I In a closed electrical circuit, three resistors (2, 4 & 6 ohms) are connected L2 CO1 [1M]
in series across 100V DC voltage source. Using Kirchhoff's Voltage Law,
determine current in the circuit?
II Draw the phasor diagram of the following: v(t)=100sin(wt+90) L1 CO2 [1M]
i(t)=2sin(wt+270)
III State Faradays law of electromagnetic induction. L1 CO3 [1M]
IV What is nuclear fission? L1 CO4 [1M]
V Name the two components of a two-part electricity tariff and write its L1 CO5 [1M]
expression to calculate electricity bill.
BASIC ELECTRONICS ENGINEERING
VI What are the applications of Zener diode. L2 CO1 [1M]
VII What is diffusion? L1 CO2 [1M]
VIII What are the applications of RC coupled amplifier. L1 CO3 [1M]
IX Convert Decimal number 43 into Hexadecimal and BCD number system. L1 CO4 [1M]
X Convert binary code 10111011 into gray code. L1 CO5 [1M]
PART –B ( BASIC ELECTRICAL ENGINEERING)
UNIT – I
2(a) I State Superpostion theorem? L1 CO2 [3M]
II Calculate the equivalent resistance across 100V voltage source?(step by L2 CO2 [7M]
step)
(OR)
2(b) I Write about impedance, active power, reactive power, apparent power and L2 CO2 [5M]
power factor?
II Determine the RMS voltage of the following waveform. (Assume T/2 = π) L3 CO3 [5M]
UNIT – II
3(a) I Explain the working principles of a DC generator. How does it convert L2 CO5 [6M]
mechanical energy into electrical energy, and what are the main
components involved?
II Explain the working principle of transformer with neat sketch. L1 CO5 [4M]
(OR)
3(b) I Explain the construction of a permanent magnet moving coil (PMMC) L2 CO1 [5M]
instrument.
II Explain the operation of a moving iron (MI) instrument. L2 CO1 [5M]
UNIT – III
4(a) I Discuss the advantages and disadvantages of hydro power plant. L2 CO1 [5M]
II A two-part tariff for a factory is as follows: L3 CO5 [5M]
Fixed component of the tariff: Rs. 1,000 per month
Variable component of the tariff: Rs. 9 per unit (kWh)
Appliance Daily Usage Power Rating
(hours) (watts)
Machine 1 10 2000
Machine 2 10 1000
Process 1 8 1500
Process 2 9 1800
Calculate the total energy charges for one month?
(OR)
4(b) Write the safety precautions against electric shock. Also, Explain the plate L2 CO1 [10M]
earthing with sketch.
BASIC ELECTRONICS ENGINEERING
UNIT – IV
5(a) I Explain the PN Junction’s Forward bias and Reverse bias with neat L1 CO5 [5M]
diagrams?
II Compare the avalanche and Zener breakdowns. L3 CO1 [5M]
(OR)
5(b) I Explain the construction process of BJT with neat sketches L3 CO1 [5M]
II Explain characteristic curves of CE configuration with neat sketch. L1 CO5 [5M]
UNIT – V
6 (a) Explain the block diagram description of DC Power supply. Also, explain L3 CO5 [10M]
working of Bridge rectifier with C-filter with neat waveforms.
(OR)
6(b) I Explain the frequency response of RC coupled amplifier with neat sketch L3 CO5 [6M]
II Explain block diagram of Public Address System. L1 CO5 [4M]
UNIT – VI
7(a) I Perform the following conversions: L1 CO5 [5M]
i) (921.58)10→()8ii) (784.65)10→()16
II Perform the following conversions: L3 CO1 [5M]
a) (CA)16to Binary b) (10111111)2to octal
(OR)
7(b) I Discuss in detail about the basic logic gates and Special logic gates using L1 CO5 [5M]
truth table.
II Design full adder circuit using half adder. L3 CO1 [5M]
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