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Unformatted text preview: song (shs546) – Practice HW 20 – weathers – (22202) 1 This printout should have 12 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 0.0 points The electric field between the plates of an air capacitor of plate area 0 . 26 m 2 is changing at a rate of 45700 V / m / s. The permitivity of free space is 8 . 85419 × 10 12 C 2 / N / m 2 . What is Maxwell’s displacement current? Answer in units of A. 002 0.0 points The electric field in an electromagnetic wave (in vacuum) is described by E = E max sin( k x ω t ) , where E max = 58 N / C and k = 8 . 2 × 10 8 m 1 . The speed of light is 2 . 99792 × 10 8 m / s. Find the amplitude of the corresponding magnetic wave. Answer in units of T. 003 (part 1 of 2) 0.0 points What is the wavelength corresponding to a frequency of 7 × 10 19 Hz of electromagnetic wave in free space? The speed of light is 2 . 99792 × 10 8 m / s....
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This note was uploaded on 04/22/2011 for the course PHYS 2220 taught by Professor Littler during the Spring '00 term at North Texas.
 Spring '00
 Littler

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