Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 2nd Sem 71538 Electromagnetic Fields Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (EE ) (PT) (Sem.?2)
ELECTROMAGNETIC FIELDS
Subject Code : BTEE-403
M.Code : 71538
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION - B & C . have FOUR ques tions each.
3 .
Attempt any FIVE questions from SECT ION B & C carrying EIGHT marks eac h.
4 .
Select atleast T WO que stions from SECT ION - B & C.
SECTION-A
Write briefly :
1.
Compute the divergence of the vector xi + yj + zk.
2.
What is a Laplacian operator?
3.
Determine the charge that produces an electric field strength of 40 V/cm at a distance of
30 cm in vacuum.
4.
Write Laplace's equation in cylindrical coordinates.
5.
What is the condition for the field to be realizable as static magnetic field?
6.
Calculate the frequency at which the conduction and displacement currents become equal
with unity conductivity in a material of permittivity 2.
7.
Define the Equation of Continuity for time varying fields.
8.
What do you understand by wave polarization?
9.
What will happen when the wave is incident obliquely over dielectric -dielectric
boundary?
10. Define Uniform Plane Wave Propagation.
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SECTION-B
11. What is Gauss law? How Gauss law is applicable to point charge and infinite line charge.
12. What are the boundary conditions for static electric fields in the general form at the
interface between two different dielectric media? Explain.
13. Define Biot Savart law. Calculate the magnetic field of line current along a thin straight
wire of infinite length.
14. Differentiate between phase velocity and group velocity. Explain using suitable example.
SECTION-C
15. State and prove Poynting Theorem.
16. State and explain the Maxwell's equation for time varying fields both in differential and
integral form.
17. Discuss the wave propagation in a conducting medium. Derive Helmoltz equation.
18. Obtain an expression for the propagation constant in good conductors. Explain skin
effect.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 February 2021