Electromagnetic Engineering Question Paper - May 2016 - Electronics Engineering (Semester 5)

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Electromagnetic Engineering - May 2016

MU Electronics Engineering (Semester 5)

Total marks: --
Total time: -- INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Attempt any four

1(a) Point charges Q₂ = 300 μC located at (2,-1,-3) m experiences a force ¯¯¯¯¯¯F2=8¯¯¯¯¯ax−8¯¯¯¯¯ay+4¯¯¯¯¯azN.F2¯=8ax¯−8ay¯+4az¯N. \displaystyle \overline {F_2}=8\overline {a_x}-8 \overline {a_y}+4\overline{a_z}N. due to point charges Q₁ at (3,-4,-2)m. Determine Q₁. 5 marks

1(b) the height of a monopole antenna is &lambda 5 marks

1(c) State and explain Biot-Savart's law 5 marks

1(d) Find out the divergence and curl of the following function
¯¯¯¯F=2x2y¯¯¯ax+x2z¯¯¯ay+yz3¯¯¯azF¯=2x2ya¯x+x2za¯y+yz3a¯z \overline {F}=2x^2 y\overline {a}_x+x^2z\overline{a}_y+yz^3\overline{a}_z 5 marks

2(a) Derive Maxwells integral and point form of equations for static fields 5 marks

2(b) Find electric fields intensity E due to an infinite surface charge. 5 marks

3(a) Define the polarization of wave. Explain different types of polarization 5 marks

3(b) Derive boundary conditions for electric and magnetic fields at the boundary of two dielectric media. 5 marks

4(a) Explain in detail FDM method also state advantages and drawback of it. 5 marks

4(b) State Poynting theorem and derive the average poynting vector. 5 marks

5(a) Explain the significance of the term 'effective area of an antenna'. Derive the relationship between effective area and directivity of any antenna. 5 marks

5(b) Explain the principle modes of operation of helical antenna and draw its radiation pattern 5 marks

6(a) Classify anf explain different types of wave propagation. 5 marks

6(b) Explain folded dipole antenna and its applications. 5 marks

6(c) Explain following terms critical frequency, virtual height, maximum usable frequency 5 marks

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