Test 2 ramlee revised
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![TEST 2: ELECTROMAGNETIC THEORY (SEE 2523)<br />Duration: 1 hour Instruction: Answer ALL questions<br />Q1.<br />Given a coaxial capacitor with the length of L which has two coaxial conductors with radius a and b for inner and outer conductor, respectively. The inner conductor carries the total charge of –Q C whilst the outer carries +Q C. Show that the capacitance as: [5 marks]<br />C=2πεLlnba<br />If the length of the coaxial, L = 100m, the inner radius a = 1cm and the outer radius b = 4cm and the coaxial is filled with the lossy Teflon (εr = 2.2 and σ = 4 Sm-1), determine:<br />,[object Object]](https://image.slidesharecdn.com/test2ramleerevised-110309080636-phpapp01/85/Test-2-ramlee-revised-1-320.jpg)
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Test 2 ramlee revised
- 2. The resistance across the Teflon [3 marks]
- 3. The Polarization Vector, P, and surface bound density, ρρs at r = a and r = b [4 marks]
- 4. Potential Different between r = 3cm and r = 6cm [4 marks]
- 6. Repeat Q2 (a)by substituting Region 2 with free space and Region 1 with Silver (σ = 6.1x107 Sm-1). Given ρs = 4 nCm-2, determine E and D at point (2,2,6) and (1,3,4) [5 marks]∇=∂V∂r r+∂Vr∂∅ ∅+∂V∂z z<br />∇2V=1r∂∂r(∂V∂r) +1r2∂2V∂∅2+∂2V∂z2<br />