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Reg No.:_ Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SIXTH SEMESTER B. TECH DEGREE EXAMINATION(S), DECEMBER 2019
Course Code: EE302
Course Name: ELECTROMAGNETICS

Max. Marks: 100 Duration: 3 Hours
PARTA

Answer all questions, each carries5 marks. Marks
1 Explain the physical significance of Divergence of a vector field. (5)
2 Two-point charges of 20nC and -20nC are located at (1,0,0) and (0,1,0) (5)

respectively in free space. Calculate the electric field intensity at (0,0,1).

3 State and prove Ampere’s Circuital law. (5)
4 Explain Electric Polarization. (5)

What is meant by uniform plane waves? Also, why are electromagnetic waves (5)

called as transverse electromagnetic waves?

6 Explain Poynting vector and Poynting theorem. (5)

7 Explain skin depth and obtain an expression for it. (5)

8 Explain characteristic impedance and standing wave ratio of transmission line. (5)
PART B

Answer any two full questions, each carries10 marks.
9 Verify divergence theorem for the vector field H = 2pZ*a, + pcos*@@z over (10)

the surface defined by 0 = 2, 0 > 2 > 2, 0 > © 527.

10 a) − ↥⊖⊙∁∘≤∂−⋮∘⋝∎⋅∏∂−

⋀⋁⊜∁↥∘⊺∱⇂⋅⊜⇂⊔⊟−− 23 ap + ಕ at a point with spherical (6)

coordinates ಇತಿ?) Find (i) Magnitude of E (ii) Unit vector in cartesian
coordinate in the direction of E.
b) Explain Equipotential surface. (4)
11 a) Derive the expression of Electric field intensity due to infinite line charge having (6)
line charge density ‏رم‎ சோ.
b) Derive Laplace’s equation for electrostatic field. (4)

PART C
Answer any two full questions, each carries10 marks.

12 Derive Maxwell’s equations in integral form and point form. (10)

13 a) A circular loop of radius ‘a’ m is carrying a current of I A. Find the magnetic (6)

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