PRE2_93

# PRE2_93 - PHYSICS 214 PRELIM #2 July 28, 1993 Name: _...

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PHYSICS 214 PRELIM #2 July 28, 1993 Name: ______________________________________ Please box all answers. Give numerical answers when possible ; otherwise give symbolic answers containing only given quantities and known constants. Specify both the magnitude and direction of all vector quantities. If you need more room for a problem, write "over" and continue on the back. Good luck! 1. The magnetic field of an EM plane wave is given by: [35] B = B 0 cos (kz + wt + _/12) where k = 3.0 rad/m, w =3.0 rad/s, | B 0 | = 5.0 x10 -4 T, and the direction of B 0 is as shown. (a) What is the amplitude vector E 0 of the electric field of the wave? Give magnitude and direction.

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(1b) What is the intensity of the wave? (c) If this wave passes through a polarizer whose pass axis is the y-axis, write the electric field equation for the transmitted wave. (d) You have a loop antenna of radius 2.0 cm with 50 turns. How would you orient the antenna for maximum sensitivity? (Give the direction of the loop axis.) What would be the
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## This note was uploaded on 11/16/2011 for the course PHYS 214 taught by Professor Thorne during the Summer '08 term at Cornell.

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PRE2_93 - PHYSICS 214 PRELIM #2 July 28, 1993 Name: _...

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