HW17 - Betancourt (mb6366) – HW17 – Betancourt –...

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Unformatted text preview: Betancourt (mb6366) – HW17 – Betancourt – (35561) 1 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Covers 32.1-32.6 001 14.0 points In a particular medium the speed of light is three-fourths that of the speed of light in vacuum and the electric field amplitude has a maximum value of 2 . 8 mV / m. The speed of light is 2 . 99792 × 10 8 m / s . Calculate the maximum value of the mag- netic field. Answer in units of T. 002 (part 1 of 2) 10.0 points The cable is carrying the current I ( t ). Evaluate the electromagnetic energy flux S at the surface of a long transmission cable of resistivity ρ , length ℓ and radius a , using the expression vector S = 1 μ vector E × vector B . 1. None of these. 2. S = μ I 2 2 π a 2 3. S = ρ I 2 2 π 2 a 3 4. S = ρ ℓ I 2 π a 2 5. S = μ ǫ ρ I 2 π a 2 6. S = ǫ μ I 2 2 π a 2 7. S = π a 2 I 2 ρ ℓ 8. S = I 2 4 π μ c ℓ 9. S = μ c I 2 4 π a...
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This note was uploaded on 11/12/2009 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas.

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HW17 - Betancourt (mb6366) – HW17 – Betancourt –...

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