Engineering FE Engineering Common Sem 1 Basic Electrical and Electronics Engineering Dec 2019 CBSGS Question Paper - Mumbai University | munotes

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Older exam Dec 2019 - R16 Semester-end · Basic Electrical and Electronics Engineering → Newer exam 2022 - Summer R19 Semester-end · Basic Electrical and Electronics Engineering →

Questions asked in this paper

Q1 Question No. 1 is compulsory
Q2 Answer any three questions out of remaining five questions
Q3 Assumption made should be clearly stated
Q4 Answer to questions should be grouped together and written together
- a. Find Rap 3
- b. Find the Norton’s equivalent across AB. 3
- c. inductor of 0.2 H is connected across single phse 200 V, 50 Hz 3 supply. Write the instantaneous equation of voltage and current
- d. Write any four conditions of series resonance. 3
- e. What is the phase line relation in star connected system? 2
- f. Explain the working of a single phase transformer under load 4
- g. Illustrate the working of half wave rectifier. 2
- b. The impedances (8+6) Q and (10-j10)Q are connected in parallel across 8 voltage of 23020, Determine current in each branch and kVA, kVAR, kW and power factor of the whole circuit
- c. Derive emf equation of a single phase transformer 6
Q3 a. Calculate the phase and line currents in a balanced delta connected load taking 75 kW at a power factor of 0.8 lag from a three phase 440 V supply. Also calculate the per phase impedance 8 marks
- b. Illustrate with neat circuit diagram the procedure for conducting open 6 circuit test and short circuit test
- c. Illustrate with neat diagram and explain the input characteristics of an 4 NPN transistor in CE configuration
- d. Draw the circuit diagram and output voltage waveform of a full wave 2 rectifier with capacitor filter
- b. Three identical coils each having a resistance of 10 and an inductive reactance of 10 Q are connected in star across 400 V three phase supply. 4 Find the reading on each of the watt meters connected to measure the
- c. Define the rms value of an ac quantity. 5
- d. Derive rectification efficiency and ripple factor of a full wave bridge 4
Q5 a. Determine the current through 8 Q resistor in the network using 8 marks
- b. Anrms voltage of 10020 is applied to an impedance Z = 20230, Find 4 the current through the circuit and power factor of the circuit
- c. Derive the conditions for maximum efficiency of a single phase 8
- b. A series R-L-C circuit with R=10 Q, L=0.014 H and C=10 uF is 7 Calculate a) resonance frequency b) current at resonance c) Q-factor d) voltage across inductor and capacitor and e) power factor at resonance
- c. Prove that the power and power factor in a balanced three phase circuit 6 can be calculated from the reading of two watt meters. Draw relevant connections and phasor diagram

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