SRM University 2007 B.Tech Electronics and Communications Engineering Bank : Electromagnetic Field Theory - Question Paper
Wednesday, 30 January 2013 07:35Web
Page 1 of 4
SRM Institute of Science & Technology
School of Electronics & Communication Engineering
ques. Bank
Subject Code : EC203
Subject Name : Electromagnetic Field Theory
Year & Semester : II Year III Sem (ECE)
UNIT-I – Static Electric Fields
PART- A
1. Define Coulomb’s legal regulations.
2. Define Divergence.
3. Define Dipole moment.
4. Define a dipole.
5. State Gauss’s legal regulations.
6. State Divergence theorem.
7. What are Streamlines?
8. Define Potential gradient.
9. Give the point form of Gauss’s legal regulations.
10. Electric field is conservative field. Justify.
11. Define Potential difference.
12. Define absolute Potential.
13. What is electric flux density and provide its relation with electric field intensity?
14. What is electric flux density of infinite sheet of charge?
15. What is electric flux density of an infinite line charge?
16. Show that the D field due to a point charge has divergence of zero.
17. Show that electric field intensity due to infinite line charge has zero divergence.
18. The point charge of 5nC is located at (2,0,4) obtain the electric field intensity at (1,-3,7) due to point charge.
19. If u=?2cos 2? ,find the gradient of u.
20. Give the expression for energy stored in static electric field.
21. What is meant by equipotential surface?
22. Define electric field intensity.
23. If T= 10r sin2? ar , obtain ?.T.
24. A charge of +10 C is located at x=0 and y=1 and a charge of -5 C is at the point x=0 and y=-1. Fine the point on y axis at which net E=0.
25. Given that D= z?cos2? az C/m2, compute the charge density at (1,?/4,3).
PART-B
1. Derive electric field intensity at the provided point due to line charge of infinite length.
2. State and prove divergence theorem for electric field.
3. Apply Gauss’s legal regulations to an unsymmetrical field.
4. Apply Gauss’s legal regulations to an
a) infinite line charge
b) infinite sheet of charge.
5. Define dipole. Derive the electric field intensity, E and the potential due to a dipole.
6. Obtain the expression for energy density in an electrostatic field.
7. Point charge 1mC and -2mC are located at (3,2,-1) and (-1,-1,4) respectively. compute the electric force on a 10nC charge located at (0,4,1) and electric field intensity at that point.
8. A circular ring of radius ‘a’ carries a uniform charge ?L C/m and is placed on the XY plane with the axis identical as z axis.
a) Show that electric field intensity, E at (0,0,h)= ?Lah/(2??o(h2+a2)3/2
b) If the total charge on the ring is Q obtain E as a->0.
9. If G(r)= 10e-2z (r ar+az), determine the flux of G(r ) out of entire surface of the cylinder r=1 and 0
10. Two point charges are located at points P1(-1, 0,0) and P2(1,0,0). The charge at P1 is 1?C and the charge at P2 is -2 ? C. obtain the location on the X axis where a positive test charge will not experience any force. Distance are in meters.
| Earning: Approval pending. |
