BE8251 Important 16 Mark questions Basic Electrical and Electronics Engineering

BE8251 Important 16 mark questions Basic Electrical and Electronics Engineering BEEE for regulation 2017 Anna University Free download. Basic Electrical and Electronics Engineering Important 16 mark questions BEEE pdf free download.

Sample BE8251 Important 16 mark questions Basic Electrical and Electronics Engineering BEEE

1. With a neat sketch, explain the construction, working
of DC Motor and also explain the different parts. (16)

2. (i) With a neat diagram explain the construction and
working of D.C. Generator. (12)
(ii) Derive the EMF equation. (4) (BE8251 Important 16 mark questions Basic Electrical and Electronics Engineering)

3. (i) Obtain the mathematical expression for
generated EMF or EMF Equation of Generator and
explain each term. (8)
(ii) Calculate the generated EMF by 4-pole wave
wound generator having 65 slots with 12 conductors
per slot when driven at 1200 rpm the flux per
pole is 0.02Weber. (8)

4. Obtain the mathematical equation for voltage or
current equation and also explain for (i) DC Series
Generator (ii) DC Shunt Generator (iii) DC Compound
Generator with suitable diagram for each. (16) (BE8251 Important 16 mark questions Basic Electrical and Electronics Engineering)

5. What is meant by DC Motor? Describe the terms such
as (i) Faraday’s Law of ElectroMagnetic Induction. (ii)
Fleming’s Left Hand rule.(iii) Back or Counter emf.
(iv) Voltage Equation of DC Shunt Motor.
(v) Armature Torque of DC Motor. (16)

6. (i) Describe various types of self excited Dc
generators with their circuit layout. (8)
(ii) Explain the characteristics of DC shunt motor. (8) (BE8251 Important 16 mark questions Basic Electrical and Electronics Engineering)

7. (i) A 200V Dc shunt motor takes a total current
of 100A and runs at 750 rpm. The resistance of the
armature winding and of shunt field winding is0.1 Ω
and 40Ω respectively. Find the torque developed by the
armature. (8)
(ii) Explain the basic nature of the emf induced in
the armature of a DC machine. (4)
(iii)How can the alternating current waveform in
the armature be converted into a DC waveform? (4)

8. A 25kW, 250V, dc shunt generator has armature
and field resistances of 0.06 ohm and 100 ohm
respectively. Determine the total armature power
developed when working (i) as a generator delivering
25 kW output and (ii) as a motor taking 25kW. (16) (BE8251 Important 16 mark questions Basic Electrical and Electronics Engineering)

9. What is meant by Transformer? Draw the circuit
diagram for Single Phase Transformer and also
explain the Principle, Construction,Working of it. (16)