Lect22 - 06 E 0 Q 0A Q 0 EA Q dQ dt 0 d 0 dt ID 10 !"...

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Unformatted text preview: 06 E 0 Q 0A Q 0 EA Q dQ dt 0 d 0 dt ID 10 !" $ ! % & I dQ dt # ' ! ' % % ! ( ) ID 0 % d dt E 08 Free space + / % &. % $. ' ,, . 0 $ ! " # $ $ 1 % 1 1 1 1' 10 & % & % & % % 3 4' + % % )%2 5 %/ 3 ' %2 % % / )+ + 6 6 4 * + / % &. % $. ' ,, . 0 $ # $ $ % ' 3'4 8 ( 3 4 , " 3 4 9 $ # 11 ) # X #* + # 7 + / % &. % $. ' ,, . 0 $ # $ ( $ E 0 ( ! " 3'4 E Q1 R2 3 4 E 0 Q1 R 2 0 3 4 E Q1 A Q1 0 3 4 E Q1 r & E $ 0 Q1 R2 E Q1 2 0 R 13 : + / % &. % $. ' ,, . 0 $ E # $ ( $ Q1 R2 0 ( ( , E ! - " " 3'4 Q1 0 r 2 3 4 E Q1 0 R 2 3 4 E Q1r 2 2 0R 3 4 E Q1 r 2 2 0R $ E E A E Q1 r2 R2 0 E Q1 r 2 R2 0 ; 15 + / % &. % $. ' ,, . 0 $ E Q1r 2 2 0R # $ ( $ ID " d 0 E dt I1 R r ( ! 3'4 I D R2 I1 2 r 3 4 ID r I1 R 3 4 ID r2 I1 2 R E 3 4 ID ID $ dQ1 r 2 0 dt dt R 2 r2 I D I1 2 R d r2 I1 2 R 17 < + / % &. % $. ' ,, . 0 $ ID # $ ( $ r2 I1 2 R o I B d " ID I r 2 R2 0 1 ( 3'4 B I 2 R 0 1 3 4 B I 2 r 0 1 3 4B B d I R 2 r2 0 1 3 4 B I ID o 0 $ B 2 r B 0 1 r2 0 I1 2 R - 19 I r 2 R2 At time t=0 the switch in the circuit shown below is closed. Points A and B lie inside the capacitor; A is at the center and B is toward the outer edge. 6 + Compare the magnitudes of the magnetic fields at points A and B just after the switch is closed A. BA < BB B. BA = BB C. BA > BB . / B 21 I r 2 R2 0 1 At time t=0 the switch in the circuit shown below is closed. Points A and B lie inside the capacitor; A is at the center and B is toward the outer edge. 6 After the switch is closed, there will be a magnetic field at point A which is proportional to the current in the circuit: A. True B. False B ! I r 2 R2 0 1 # ) 0 1 1 = + . , / % &. % >? ,$. ' 0 $ ( ! " B1 I r 2 R2 0 1 3'4 ) ! 0 ,/ ) 25 3 4 / / , 0@$ 3 ) 4 ,$ 3 4 = + 3 * " , ! % % >? 4. 3'4 A ( 3 4 BC & D (@ ( # # E 3 ( , &@3' -4 # + 2 30 * 33 7 E xB Points in direction of propagation 35 : 37 ; An electromagnetic plane-wave is traveling in the +z direction. The illustration below shows this wave at some instant in time. Points A, B and C have the same z coordinate. 6 Ex = E0sin(kz- t) Compare the magnitudes of the electric fields at points A and B A. EA < EB B. EA = EB C. EA > EB ( , (( # 40 36# > 4! # ' . . < An electromagnetic plane-wave is traveling in the +z direction. The illustration below shows this wave at some instant in time. Points A, B and C have the same z coordinate. 6 + Ex = E0sin(kz- t) Compare the magnitudes of the electric fields at points A and C B. EA = EC C. EA > EC A. EA < EC ( , (( # 45 36# > 4! # ' . . - = > Ex = E0sin(kz- t) 3) % ' 3) '4 4 4 4 #4 2 % 2 # 2 2 #4 ) F 2 . () ) ) % 2 2 45 ...
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This document was uploaded on 03/08/2012.

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