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<!DOCTYPE html>
<html>
<head>
    <title>Question Paper</title>
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        .question {
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            text-align: left;
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        h4
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        h3
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            text-decoration-style: bold;
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        h2
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<body>
   <h3>B.TECH (semester-1)</h3>
       <h2>BASICS OF ELECTRICAL ENGINEERING<br>
        SUBJECT CODE: BELED-101<BR>
    Paper II: [110004]</h2>
    <h4>Time:03 Hours</h4>
    Instructions for candidates
     <ol>
        <li>Section A is Compulsory.</li>
        <li>Attemp any four questions for Section B.</li>
        <li>Attemp any two questions for Section C.</li>
        <li>Any missing data may be assumed appropriately</li>
    </ol>
 <h3>Section - A</h3>
    <div class="question">
        <p>Q1</p>
         <ol type="a">
        <li>From fundamentals obtain expressions for power energy?</li>
        <li>Define RMS value, average value and form factor</li>
        <li>Indicate how the parameters in a series RLC circuit vary with frequency</li><br>
        <li>Discuss the advantages of 5-phase sytem over single phase system</li><br>
        <li>What are the different types of Induction motors?</li>
        <li>State Lenz's law</li>
        <li>What is form factor</li>
        <li>Explain armature reaction in D.C. machine</li>
        <li>State and explain krichhhoff's laws.</li>
        <li>Plot and waveform of voltage and current for R-L series circuits</li>
    </ol>


    </div>

    <h3>Section - B</h3>

    <div class="question">
        <p>Q2. Write the relationship of star-delta transformation of three resistors.</p>
        <p>Q3. Explain frequency,time period,Instentaneous value, maximum value and average value for a sinusoidal voltage</p>

        <p>Q4. A single-phase transformer is required to step down and voltage from 1100 V to 400 V at 50 Hz The core has a cross-sectional area of 25 cm<sup>2</sup> and the maximum flux density is 5 Wb/m<sup>2</sup>. Determine the number of turns of the primary and secondary windings.</p>

        <p>Q5. Three identical coins are connercted in star across a three-phase 415 V, 50 Hz supply. The total power drawn is 3 kW at a rower factor of 0.3. Calculate the resistance and indusctance of each coil.</p>

        <p>Q6. Explain the principal of working of three-phase induction motor.</p>

       

    </div>

     <h3>Section - C </h3>
     <div class="question">
        <p>Q7. What do you understand by D.C. machines? What are the different types of D.C. machines? Discuss working principle of these machines. Explain the function of brush and commutator in a dc machine for generating action</p>

        <p>Q8. Write short notes on the following: (i) Magnetzing reactance (ii) Leakage reactance (iii) Efficiency</p>

        <p>Q9. Explain 3-phase EMF generation Derive relationship between phase and line for three phase star connections and delta connections.</p>
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