Follow US



2183 views

ELECTROMAGNETIC FIELDS (EMF) IMPORTANT QUESTIONS

Author Message
Anna University
V.I.P Team
V.I.P

Posts: 960 Joined: Jan 2012 Reputation: 99 Status: OFFLINE
Rupees: Rs.98.45
Post: #1
ELECTROMAGNETIC FIELDS (EMF) IMPORTANT QUESTIONS

Anna University
Important Questions

Common To


EC43:Electromagnetic Fields
EC1253 Electromagnetic Fields
080290021:Electromagnetic Fields
147403:Electromagnetic Fields
10144EC404:Electromagnetic Fields

Note :

This are only Important Questions obtained from Previous year Question Paper, these Question may or may not come in Exam, Vidyarthiplus doesn't take any responsibility in it.

Unit I

1.Derive the expression for electric Field on the axis at a point h m of a uniformly charged
circular disc of radius a m with a charge density of ρs c/m2
2. Find the electric field intensity of a straight uniformly charged wire of length ‘L’m
and having a linear charge density of +ρ C/m at any point at a distance of ‘h’ m
3. State and Prove Gauss’s law. List the limitations of Gauss’s law.
4. Find the magnetic field density at appoint on the axis of a circular loop of a radius b that carries a current I
5 Explain coulomb’s Law .three equal positive charges of 4X 10-9 coulomb each are located at three corners of a square ,side 20cm.determine the electric field intensity at the vacant corner point of the square.

Unit II

1.Circular disc of radius ‘a’ is uniformly charged with a charge density of s c/m2. Find the electric field intensity at a point ‘h’ from the disc along its central axis
2. Derive an expression for magnetic field strength, H, due to a current carrying conductor of finite length placed along the y- axis, at a point P in x-z plane and ‘r’ distant from the origin.
3. Derive the expression for the E at a point P due to an electric dipole.
4. Find the magnetic field intensity at the centre O of a square loop of sides equal to 5M and carrying 10A of current

Unit III


1.Solve the laplace’s equation for the potential field in the hompogenous region between the two concentric conducting spheres with radius ‘a’ and ‘b’ where b>a V=0 at r = b and V =V0 at r=a .find the capacitance between the two concentric spheres.
2.Determine the inductance of a solenoid of 2500 turns wound uniformly over a length of 0.25m on a cylindrical paper tube , 4 cm in diameter .the medium is air
3. A cylindrical capacitor consists of an inner conductor of radius a and an outer conductor of radius b. The space between the conductors filled with a dielectric whose permittivity ε, the length of the capacitor is L. Determine the capacitance
4.Derive an expression for the inductance of solenoid
5.Show that the inductance of the cable L = µl/2π (ln b/a) H.
6.Derive an expression for the capacitance of a spherical capacitor with conducting shells of radius a and b.

Unit IV

1.Solve one dimensional Laplace’s equation to obtain the field inside a parallel plate capacitor and also find the surface charge density at two plates
2.State and prove Poynting theorem.
3.Derive Maxwell’s equation derived from Faraday’s law both in Integral and point forms
4. Three capacitors of 10,25 and 50 microfarads are connected in series and parallel. Find the equivalent capacitance and energy stored in each case ,when the combination is connected across a 500 V supply
5.Derive modified form of Ampere’s circuital law in Integral and differential forms

Unit V

1.Derive the expression for the reflection by a perfect dielectric –normal incidence
2.Obtain the wave equation for a conducting medium
3.Derive the wave equation starting form Maxwell’s equation for free space For good dielectrics derive the expressions for α, β, ν and η.
4. Find α, β, ν and η. for Ferrite at 10GHz εr = 9, μr = 4, σ = 10 ms/m


For the student , by the student , to the student !!


Possibly Related Threads...
Thread: Author Replies Views: Last Post
  080230069 Cloud computing Important Questions - All Units Srini 0 276 03-04-2014 07:54 AM
Last Post: Srini
  ELECTRIC CIRCUITS AND ELECTRON DEVICES - Two Marks Important Questions Srini 4 4,259 25-01-2014 09:56 AM
Last Post: pujimani
Thumbs Up ANNA UNIV- BASIC INDUSTRIAL BIOTECHNOLOGY- IMPORTANT 16 MARKS indiainspire 1 348 05-12-2013 01:27 PM
Last Post: Rdx
  ANNA UNIV- BT2255 MICROBIOLOGY IMPORTANT 16 MARKS indiainspire 2 399 04-12-2013 10:59 AM
Last Post: indiainspire
  BT2202 BIOORGANIC CHEMISTRY IMPORTANT QUESTIONS indiainspire 0 282 03-12-2013 08:32 PM
Last Post: indiainspire
02-05-2012 06:33 AM
Find Quote



Vidyarthiplus | Contact Us | Return to Top | Lite (Archive) Mode


Powered By MyBB, © 2002-2014MyBB Group.

Powered by V+ Team