Download JNTUK B-Tech 2020 R19 ECE 1202 Basic Electrical Engineering Electronics And Communication Engineering Model Question Paper

Download JNTUK (Jawaharlal Nehru Technological University Kakinada (JNTU kakinada)) B-Tech 2020 R19 ECE 1202 Basic Electrical Engineering Electronics And Communication Engineering Model Previous Question Paper

16

[B19EE1202]

I B. Tech II Semester (R19) Regular Examinations
BASIC ELECTRICAL ENGINEERING
ELECTRONICS & COMMUNICATION ENGINEERING
MODEL QUESTION PAPER
TIME: 3Hrs. Max. Marks: 75
Answer ONE Question from EACH UNIT.
All questions carry equal marks.
UNIT-I CO KL M
1. . State and explain Kirchhoff?s Laws with example CO:1 K2 8M
(b). Derive star-delta and delta- star Transformation for Equal resistances CO:1 K3 7M
(OR)
2. . If ?n? number of resistances connected in parallel, derive the expression
for the equivalent resistance?
CO:1 K2 8M
(b). Find Req for the given circuit

CO:1 K3 7M
UNIT-II
3. . Discuss the Analysis of single-phase ac circuits consisting of pure
inductor.
CO:2 K3 8M
(b). Find the average value, RM.S value, form factor and peak factor for the
wave form shown in figure.

CO:2 K3 7M

(OR)


4. . Derive Average and RMS value of a sinusoidal waveform CO:3 K5 8M
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16

[B19EE1202]

I B. Tech II Semester (R19) Regular Examinations
BASIC ELECTRICAL ENGINEERING
ELECTRONICS & COMMUNICATION ENGINEERING
MODEL QUESTION PAPER
TIME: 3Hrs. Max. Marks: 75
Answer ONE Question from EACH UNIT.
All questions carry equal marks.
UNIT-I CO KL M
1. . State and explain Kirchhoff?s Laws with example CO:1 K2 8M
(b). Derive star-delta and delta- star Transformation for Equal resistances CO:1 K3 7M
(OR)
2. . If ?n? number of resistances connected in parallel, derive the expression
for the equivalent resistance?
CO:1 K2 8M
(b). Find Req for the given circuit

CO:1 K3 7M
UNIT-II
3. . Discuss the Analysis of single-phase ac circuits consisting of pure
inductor.
CO:2 K3 8M
(b). Find the average value, RM.S value, form factor and peak factor for the
wave form shown in figure.

CO:2 K3 7M

(OR)


4. . Derive Average and RMS value of a sinusoidal waveform CO:3 K5 8M
17



*****

(b). A 200 V, 50 Hz AC supply is applied to a coil of 0.08 H inductance
and 3.5 ? Resistance connected in series with a 7.2 ?F capacitor.
Calculate (i) Impedance (ii) Current (iii) Phase angle between current
and voltage (iv) power factor (v) power consumed.
CO:2 K5 7M
UNIT-III
5. . Derive the EMF equation of DC generator CO:2 K3 8M
(b). A shunt generator supplies a load of 7.5KW at 200V, Calculate the
generated emf if armature resistance is 0.6? and field resistance of
80?.
CO:2 K3 7M
(OR)
6. . Explain the speed control methods of DC shunt motor with neat
sketches
CO:3 K5 8M





(b). An 8-pole, wave-connected armature has 600 conductors and is driven
at 625 rev/min. If the flux per pole is 20 milli weber, determine the
generated E.M.F.
CO:2 K5 7M
UNIT-IV
7. . Explain the Principle of operation of single-phase transformer. CO:4 K5 8M
(b). An ideal 25KVA Transformer has 500 turns on primary and 40 turns
on the secondary winding. The primary winding is connected to 3000
V, 50Hz supply. Calculate (i) Primary and secondary currents (ii)
Secondary EMF (iii) Maximum flux.
CO:4 K4 7M
(OR)


8. . Draw and explain Slip-Torque characteristics of Three phase Induction
Motor.
CO:4 K3 8M
(b). A 200 KVA rated transformer has a full-load copper loss of 1.5 kW
and an iron loss of 1 kW. Determine the transformer efficiency at full
load & half load for 0.85 power factor
CO:4 K5 7M
UNIT-V
9. . Explain the working principle of Stepper motor. CO:6 K2 8M
(b). Explain the working principle of capacitor start single-phase induction
Motor.
CO:6 K5 7M
(OR)
10. . Explain the working principle of BLDC motor. CO:6 K2 8M
(b). Explain the working principle of Universal motor. CO:6 K2 7M
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