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Unformatted text preview: 3) The voltage of an electromagnetic wave traveling on a transmission line is given by ) 30 10 4 sin( 7 ) , ( 9 z t e t z v z = a) Find the frequency, wavelength, and phase velocity of the wave. b) At z=2 m, the amplitude was measured to be 2 V. Find . c) What is the amplitude of the wave measured at 10 m? 4) . A laser beam traveling through fog was observed to have an initial intensity of 1 ( W/m2). At a distance of 2 m from the laser it has an intensity of 0.2 ( W/m2). Given that the intensity of an electromagnetic wave is proportional to the square of its electricfield amplitude, find the attenuation constant of fog. 5) 9) The voltage source of the circuit shown in the figure below is given by _ ) 45 10 4 cos( 24 ) ( 4 o = t t v Obtain an expression for i L ( t ), the current flowing through the inductor. 6) 7) 8)...
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 Spring '07
 ERICFULLERTON

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