January 6, 2012

ELECTROMAGNETIC FIELDS JNTU previous years question papers


ELECTROMAGNETIC FIELDS JNTU previous years question papers

Time: 3 hours Max Marks: 80

Answer any FIVE Questions

All Questions carry equal marks

1. (a) E is the electric field due to a point charge Q C at the origin in free space.Find s
SE.da where S is a spherical surface of radius R m and center at origin.
(b) Using Gauss’s law, show that the electric field due to an infinite straight line of uniform charge density ? C/m along the z-axis in free space is (?/2pe0r) ar N/C.
(c) An infinitely long cylinder of radius 1m in free space is filled with a uniform charge density of 1nC/m3. If the potential on the axis of the cylinder is 100 V, find the potential variation inside the cylinder. [6+6+4]

2. (a) For a conducting body in the electric field of static charges, explain what will be the
i. net electric field inside the conductor, and
ii. potential difference between different points inside the conductor.
(b) Two thin concentric spherical conducting shells of radii 2 cm and 3.5 cm are located in free space with their center at origin. If the potentials of the inner and outer shells are -25 V and 150 V respectively, find the surface charge densities on the shells. [8+8]

3. (a) Define polarization. Explain how a dielectric acquires polarization.
(b) A long straight line of uniform charge density ? C/m is surrounded by an insulating medium out to a radius R m. Find D. Also find the electric field in the region outside the insulation. Explain why the electric field cannot be found in the insulation region. [8+8]

4. A steady current configuration in free space is as shown in figure 4.
Find the magnetic field B at the point P, starting from Biot-Savart’s law.

5. (a) Determine H for a solid cylinder conductor of radius ?, where the current I is uniformly distributed over the cross section.
(b) Two infinitely long and parallel wires carry currents I1 - I2 = I Amps in opposite direction. They are separated by a distance of 17.32 cm. If the magnetic field intensity at a point, 10 cm from one wire and 20 cm from other is 13.783 A/m, determine the value of I. [8+8]

6. (a) Prove that the force on a closed filamentary circuit in a uniform magnetic field is zero
(b) If the magnetic field is H = (0.01/µ0) ax A/m, what is a force on a charge of 1 pC moving with a velocity of 106 ay m/s . [8+8]

7. (a) Obtain the expression for coefficient of coupling between two coils.
(b) A coil of 10 mH is magnetically coupled to another coil of 600 µH. The coefficient of coupling between two coils is 0.15. Calculate the inductance if these two coils are connected in parallel addition and parallel opposition. [8+8]

8. (a) In free space E=Em sin (?t - ßz) ax V/m, from Maxwell’s equation, find H.
(b) The circular loop conductor having a radius of 0.15 m is placed in X-Y plane. This loop consists of a resistance of 25 Ohms. If the magnitude of flux density is B = 0.5 sin 103 t az Tesla, find the current flowing through the loop

FEEL USEFUL PLEASE GIVE +1

0 comments :

Post a Comment

Get Syllabus in your Mail

Labels

Accenture Admission Notice - 2010 Admission Notification Anna University Anna University Chennai Anna University Question Papers Anna University Trichy Apparel Technology and Management Aptitude Questions Arts and Science Colleges Biomedical Engineering C and CPP Ebooks Calicut University CBSE Question papers Civil Engineering Civil Service Exams Colleges in India Colleges Result Computer Science Engineering Core Jobs CS R2008 CSE CSIR NET EBooks Download ECE EEE EIE Electives Electrical and Electronics Engineering Electronics and communication Electronics and Instrumentation Engineering Engineering Engineering Colleges in Maharashtra Engineering Colleges in TamilNadu Engineering Admissions Engineering Colleges Engineering Colleges in Karnataka Engineering Jobs Engineering Syllabus Entrance Exam Dates Entrance Exam Results Entrance Examination Exam Time Table Experiencer First Year Syllabus Freshers Full Time Jobs Government jobs in india Hardware and Networking Jobs Hotel Management and Catering Technology IGNOU Information Technology INTEVIEW QUESTIONS IT Jobs JNTU Question Papers Jobs in Bangalore Jobs in Chennai Jobs in Coimbatore Jobs in Delhi Jobs in Hyderabad Jobs in India Jobs in Kerala Jobs in Noida Jobs in Tamilnadu Jobs in TATA Karnataka Educations Lab Manuals Mechanical Engineering Medical Colleges Placement Papers Plus 2 Preparation for exams Private Jobs in India Question Papers Question Papers Download Results Announcement Semester 1 Semester 2 Semester 3 Semester 4 Semester 5 Semester 6 Semester 7 Semester 8 Syllabus Syllabus Download Tamil Movie TCS Placement Papers Teaching Jobs TECH MAHINDRA Textile Technology Top colleges University Results UPSC VICEVESVARAYA TECHNOLOGICAL UNIVERSITY waec Walk-in Interview Web Designers

Followers

Archive

Anna university Engineering Syllabus

Earn Money From Online

Government jobs in india

Admission Notification

Total Pageviews

 

Privacy Policy
http://topengineeringcollegesintamilnadu.blogspot.com use third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here.