Code No: R05010501 Set No. 1
I B.Tech Semester Supplimentary Examinations, June 2009
BASIC ELECTRICAL ENGINEERING
( Common to Computer Science & Engineering, Information Technology
and Computer Science & Systems Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
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1. (a) State and Explain Ampere’s force law?
(b) State and explain Faradays laws of Electromagnetic induction?
(c) A wire of length 50 cm moves at right angle to its length at 40 met./sec. in a
uniform magnetic field density of 1.5 wb/m2(Tesla). Calculate the magnitude
of e.m.f induced in the conductor when the direction of motion is perpendicular
to the field? [6+6+4]
2. Using Thevenin’s theorem calculate the current I through the resistance connected
between the terminal A & B (All resistances are in ohms). as shown in figure 2
[16]
Figure 2
3. (a) Define the terms
i. Magnetic flux
ii. Magnetic flux density
iii. Magneto motive force
iv. Reluctance.
(b) The air gap in a magnetic circuits is 1.5 mm long and 2500 mm2in cross
sectional area. Calculate
i. the reluctance of the air gap
ii. the m.m.f required to set up a flux of 800 ×10−6wb. in the air gap.[8+8]
4. Three branches possessing a resistance of 50 Ohms an inductance of 0.15 Henrys;
and a capacitance of 100 µF respectively connected in parallel across a 100V, 50
Hz. supply as shown in figure 4: Calculate
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