Basic Electrical and Electronics Engineering 2nd MJ13

Reg.No. :
Question Paper Code : 21467
B.E./B.Tech. DEGREE EXAMINATION , MAY/JUNE 2013.
Second Semester
Civil Engineering
GE 2151/EE 26/EE 1153/10133 EE 206/080280011 – BASIC ELECTRICAL AND ELECTRONICS ENGINEERING
(Regulation 2008/2010)

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PART A – (10 X 2 = 20 marks)

1. A 120 resistor has a specified maximum power dissipation of 1 W. Calculate the maximum current level.
2. Three inductive coils each with resistance of 15 and an inductance of 0.03 H are connected in star to a 3Ö 400 V, 50 Hz supply. Calculate the phase voltages.
3. A dc shunt generator supplies a load of 10 kW at 220 V through feeders of resistance 0.1. The resistance of armature and shunt field windings is 0.05 and 100 respectively. Calculate the terminal voltage.
4. In a single phase transformer, Np = 350 turns, Ns = 1050 turns, Ep = 400V. Find Es.
5. Write any two salient points on a p-n junction.
6. When should a transistor be biased? Name two common biasing circuits.
7. Find the following binary difference: 1011010 – 0101110
8. An active high S-R latch has a ‘l’ on S-input and ‘o’ on the ‘R’ input. What state is the latch in?
9. As related to amplitude modulation, what is over-modulation, undermodulation and 100% modulation?
10. Why are digital signals said to be noise immune?

PART B – (5 X 16 = 80 marks)

11. (a) (i) (1) State and explain Kirchoff’s laws. (4)
(2) A Sinusoidal current wave is given by i = 50sin(100Ðt). Determine
the root mean square value. (4)
(ii) Write short notes on moving Iron Measuring Instruments under the