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Paper Id: 120101
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Subject Code: KEE101
Roll No:
BTECH
(SEM I) THEORY EXAMINATION 2018-19
BASIC ELECTRICAL ENGINEERING
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Time: 3 Hours
Total Marks: 100
Note: 1. The question paper contains three sections- A, B & C.
2. Read the instructions carefully in each section
3. Course outcome(CO) has been mentioned against each question.
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SECTION-A
1. Attempt ALL: [2x10=20]
- a. Define with examples: (i) Active and passive element (ii) bilateral and unilateral elements. (CO 1)
- b. Explain (i) Ideal current source (ii) ideal voltage source. (CO 1)
- c. A series circuit has R= 10O, L= 0.02H and C= 3µF. Calculate Q-factor of the circuit. (CO 2)
- d. Two ac currents one represented as I1= 25 sin (314 t + 20°) & I2= 35 sin (314 t + 45°). Draw the phasor & show the resultant when they are connected in parallel. (CO 2)
- e. What will happen if the primary of transformer is connected to dc supply? (CO 3)
- f. How can we change the direction of rotation of DC motor? (CO 4)
- g. Enlist the various methods of starting of single phase induction motor? (CO 4)
- h. Why Earth pin is made thicker and bigger than line and neutral? (CO 5)
- i. What are the advantages of auto-transformer over two winding transformer? (CO 4)
- j. Calculate the energy consumption per day in a house using 3 CFLs of 20 W each, 3 fans of 60 W each for 3 hrs a day. (CO 5)
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SECTION-B
2. Attempt any three parts of the following. Each part carries 10 marks. [3x10=30]
- (a) Find current through 2O resistance using superposition theorem in figure 1 (CO 1)
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