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Janardan Rai Nagar Rajasthan Vidyapeeth 2006 B.Tech ELECTRICAL TECHNOLOGY - Question Paper

Tuesday, 14 May 2013 03:10Web

JRN Rajasthan Vidyapeeth University





Model Question Paper


Time : 3 hrs Maximum marks : 75



1. Question paper is divided into Group A, Group B and Group C

2. Each Group is 25 Marks

3. Figure to the right in bracket indicates marks.

4. Good Handwriting is expected

5. Assume suitable data if necessary.


Group A (25 Marks)


Answer any three questions (Question 1 is compulsory)



Q.1 Explain Force, weight and electrical energy


Q.2 Define

(a) Magnetic Flux (b) Magnetic Field (c) Field Intensity (d) Flux Density.




Q.3 What is Ohms Law ? Explain kirchoffs current law and Kirchoffs voltage law ?


Q.4 What is an ideal transformer, is such a transformer possible ?

Q.5 Estimate the inductance of a solenoid of 2500 turns, uniformly wound over a length of 0.

meter on a cylindrical paper tube, 10 cm is the diameter. The medium is air.

Group B (25 Marks)


Answer any three questions (Questions 6 is compulsory)


Q.6 Find the capacitance of a parallel plate capacitor Area of each plate is 50 cm2 and distance


between plate is 0.2mm . The medium is Air. For an applied voltage of 100V find charge,

electric flux density and electric field strength.



Q.7 A coil has 500 turns. It is wound on an non magnetic core and has inductance of

9mH. a) Find the Flux produced by a current of 6 A. b) If this 6A current is reversed


in 8 milliseconds. Find the emf induced




Q.8 Explain Nickel Cadmium Cell ?

Q.9 A Series R-L Circuit has a resistance of 9 ohms and an inductive reactance of 12 ohms.

When voltage v is applied, the current is i=28.3 sin 314t Find Z, V, L ,P And Power


Factor. Draw Phasor Diagram.



Q.10. (a) Differentiate Primary cells and Secondary cells.

(b) Draw the neat sketch and explain the construction and operation of Lead Acid


Group C (25 Marks)

All Questions are Compulsory.

Q.11 Fill in the blanks ( each question carry 2 marks)

1. Ohm meter is unit of ___________

2. In magnetic circuit flux is equal to __________.

3. If the two charges Q1 and Q2 are separated by a distance r Force is__________

4. Ferromagnetic material lose their _______ properties at a certain temperature is called as_________.

5. Permeability of magnetic material corresponds to_________ in conducting material as_________.


Q.11 Multiple choice question. (Each question carry 2 marks)


1. The perfect magnetic insulator is

(a) iron (b) rubber (c) copper (d) None of the above

2. Diamagnetic materials are ______

(a) Nickel (b) Silver, Copper (c) Copper, Aluminium (d) None of these

3. IF the conductor is at 90 the direction of the field =90 the force on the conductor is

(a) BIL ( b) 0 (c) 1 (d) BIL Sin?

4. The hystersis loss in a magnetic material depends up on

  1. area of hystersis loop
  2. frequency of reversal of field
  3. volume of magnetic material
  4. all a,b and c


5. The direction of Electro-magnetically induced e.m.f. is determined by

  1. Fleming right hand rule
  2. Lenzs rule
  3. Right hand thumb rule
  4. Both a and b

Q.11 True or false (each question carry 1 marks).


1. A capacitor should have low losses.

2. Voltage is a form of potential energy.

3. Lead-Acid battery is primary cell.

4. The of conductivity is ohm-meter.


5.Coulomb first law states the force between two point charges is proportional to the square of the

distance between them.





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