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EM Wave all GATE Question and Solution : Part 2
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AKHILESH PANDEY
B.Tech. in EC, GATE 2017 AIR 18, YouTuber (channel name - STUDENT MODULATOR), 5 years Teaching Experience

U
Unacademy user
bhaiya 4th slide m , 1st eqn m angle ki galti h N sin@ + T - T cos@ = M a1 hoga btw nicely explained ☺
Chandresh
a year ago
😊😊ohk bro.thnkuh.
  1. EM Wave All GATE Que. & So Subject: Electromagnetics Part: 2 By- AKHILESH PANDEY


  2. About Me B. Tech. in Electronics & Communication GATE 2017 AIR 18 (EC) 5 Years Teaching Experience > Youtuber (channel- STUDENT MODULATOR)


  3. Que. 2 Some unknown material has a conductivity of 106 mho/m and a permeability of 4 x 10-7 H/m. The skin depth for the material at l GHz is (A) 15.9 urm (B) 20.9 m (C) 25.9 unm (D) 30.9 um GATE 1996 (2 Marks)


  4. Propagation constant for a medium Propagation constant for any medium is defined as where is permeability, is conductivity, e is permittivity of the medium, o is frequency of the EM wave in the medium 2 2 Attenuation constant: GU1 +(5)2 +11 Phase constant: =


  5. Skin Depth > The skin depth is a measure of the depth to which an EM wave can penetrate the medium Mathematically, the distance through which the wave amplitude decreases by a factor e-1 (about 37%) is called skin depth or penetration depth of the medium As the wave, travels in a conducting medium, its amplitude is attenuated by the factor eTaz. So, skin depth is determined as e -ad 0 or Or where is attenuation constant, is skin depth


  6. EM wave in a Good Conductor For a good conductor, ,602-1- ) ( Attenuation constant: 2 Phase constant: 2 1 Skin depth:


  7. Sol. 2 From the given problem, Conductivity: Permeabilitv: Frequency Hence, skin depth is GATE 1996 (2 Marks) 106 mho/m f-1 GHz = 109 Hz Vrf Vr(109)(4 x 10-7)(106) -15.9 10-6 m 15.9 m


  8. Sol. 2 Some unknown material has a conductivity of 106 mho/m and a permeability of 4 x 10-7 H/m. The skin depth for the material at l GHz is (A) 15.9 m (B) 20.9 m (C) 25.9 unm (D) 30.9 um GATE 1996 (2 Marks)


  9. Thank You Rate Review Recommend Follow My Lectures on Unacademy akhilesh.pandey