Electrical Machines - May 2013
Electronics Engineering (Semester 4)
TOTAL MARKS: 60
TOTAL TIME: 2 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Use suitable data wherever required.
(4) Figures to the right indicate full marks.
Answer any four of the following :-
1 (a) How CRO is applicable for component testing? Justify.(5 marks) 1 (b) What is Lissajous pattern? How measurement of frequency can be done it with?(5 marks) 1 (c) How power factor meter works?(5 marks) 1 (d) What is back emf voltage equation?(5 marks) 1 (e) What is hybrid stepper motor?(5 marks) 2 (a) What is dual trace, multi-trace, dual beam and sampling storage oscilloscope?(10 marks) 2 (b) With the neat diagram and waveform explain the working of phase meter using Flip-Flop.(10 marks) 3 (a) What are the Essentials of indicating instrument? Explain it in details.(10 marks) 3 (b) Explain the measurement of inductance by Maxwell's Hay's method.(10 marks) 4 (a) List various types of DVMs and explain in detail.(10 marks) 4 (b) What are the Requirements of a good laboratory type signal generator? Explain A.F. signal generator.(10 marks) 5 (a) Explain construction and working principle of stepper motor.(10 marks) 5 (b) Explain Kelvin's double bridge.(10 marks) 6 (a) List various methods of analog to digital and digital to analog conversion and explain any one in detail.(10 marks) 6 (b) What is best Frequency oscillator and explain its advantages.(10 marks) 7 (a) Describe the panel layout of CRO.(10 marks) 7 (b) How to Measure medium, low and high resistance?(10 marks)