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[BI9EE1202]
I B. Tech II Semester (R19) Regular Examinations
BASIC ELECTRICAL ENGINEERING
ELECTRONICS & COMMUNICATION ENGINEERING
MODEL QUESTION PAPER
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TIME: 3Hrs. Max. Marks: 75
Answer ONE Question from EACH UNIT.
All questions carry equal marks.
UNIT-I CO | KL | M
- (a). State and explain Kirchhoff’s Laws with example CO:1| K2 | 8M
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(b). Derive star-delta and delta- star Transformation for Equal resistances CO:1| K3 | 7M
(OR)
- (a). If ‘n’ number of resistances connected in parallel, derive the expression CO:1 | K2 | 8M for the equivalent resistance?
(b). Find Req for the given circuit Co:1| K3 | 7M
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8O
UNIT-II
- (a). Discuss the Analysis of single-phase ac circuits consisting of pure CO:2 | K3 | 8M inductor.
(b). Find the average value, R.M.S value, form factor and peak factor for the CO:2 | K3 | 7M wave form shown in figure.
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(OR)
- Derive Average and RMS value of a sinusoidal waveform CO:3 | K5 | 8M
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- (b). A 200 V, 50 Hz AC supply is applied to a coil of 0.08 H inductance CO:2 | K5 | 7M and 3.5 O Resistance connected in series with a 7.2 µF capacitor.
Calculate (i) Impedance (ii) Current (iii) Phase angle between current and voltage (iv) power factor (v) power consumed.
UNIT-III
- (a). 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 CO:2 | K3 | 7M generated emf if armature resistance is 0.6O and field resistance of 80O.
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(OR)
- (a). Explain the speed control methods of DC shunt motor with neat CO:3 | K5 | 8M sketches
(b). An 8-pole, wave-connected armature has 600 conductors and is driven CO:2 | K5 | 7M at 625 rev/min. If the flux per pole is 20 milli weber, determine the generated E.M.F.
UNIT-IV
- (a). Explain the Principle of operation of single-phase transformer. CO:4 | K5 | 8M
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(b). An ideal 25KVA Transformer has 500 turns on primary and 40 turns CO:4 | K4 | 7M 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.
(OR)
- (a). Draw and explain Slip-Torque characteristics of Three phase Induction CO:4 | K3 | 8M Motor.
(b). A 200 KVA rated transformer has a full-load copper loss of 1.5 kW CO:4 | K5 | 7M and an iron loss of 1 kW. Determine the transformer efficiency at full load & half load for 0.85 power factor
UNIT-V
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- (a). Explain the working principle of Stepper motor. CO:6 | K2 | 8M
(b). Explain the working principle of capacitor start single-phase induction CO:6 | K5 | 7M Motor.
(OR)
- (a). 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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This download link is referred from the post: JNTUK B.Tech R19 2020 Model Question Papers || JNTU kakinada (All Branches)
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