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Unformatted text preview: in the solenoid is turned off. Hence calculate the EM angular momentum. (b) Calculate the extra torques on the charged cylinders when the current of the solenoid is being switched off. Calculate the extra angular momentum the cylinders gain (or lose). Is angular momentum conserved? Q2*: G Problem 8.15 (a) , p.363. Q3: G Problem 9.12 , p.382. Q4*: An EM field is described by ( ) . sin ˆ cos sin ˆ sin cos ˆ cos cos cos t y ky kx x ky kx B B z t ky kx E E − = = r r Find the relation between E and B , and the dispersion relation between k and . This field can exist inside a square metal box of dimension k / π in the x and y directions and arbitrary height. Sketch the magnetic field at 2 = t ....
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This note was uploaded on 12/10/2011 for the course PHYS 4211 taught by Professor Wkliu during the Spring '11 term at CUHK.
 Spring '11
 WKLIU

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