161_1_Midterm1_2005

161_1_Midterm1_2005 - EE161 Fall 2005 Name: Grade: Problem...

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EE161 Fall 2005 N a m e : G r a d e : Problem #1 (25 points). The electric field of a plane wave propagating in air has the following expression given by ) 6 8 sin( 3 ˆ ) ( z x t y t + + = ω E . (1) (5 points) find the frequency of the wave. (2) (5 points) find the angle between the propagation direction and the Z-axis. (3) (5 points) write down the phasor expression of the electric field. (4) (10 points) find the associated magnetic field in phasor.
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wave propagates in a infinite semiconductor medium with dielectric constant 9 = r ε and (S/m) 70 = σ . At the reference plane Z=0, the time domain electric field is measured to be ) 45 cos( 10 ˆ ) , 0 ( o t x t + = ω E . (1) (5 points) Identify which category this medium belongs among good dielectric, quasi conductor or good conductor. (2) (10 points) Find the time-domain expression of both the electric field and magnetic field ) , ( t z E and ) , ( t z H
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161_1_Midterm1_2005 - EE161 Fall 2005 Name: Grade: Problem...

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