EMWT ONLINE 1

1 . Fo r n o r m al i n c i d e n c e of a wave o n d i e l e c tr i c - c o n d u c t or i nt e r f a c e t h e m ag n i t u d e o f r e fl e c ti o n c o e ffi c i e nt i s ( a) Z e ro ( b ) U n i ty ( c ) I n b e twe e n 0 a n d 1 ( d ) I n fi n i ty

2 . T h e d i m e n s i o n o f a r e fl e c ti o n c o e ffi c i e nt i s ( a) A / m ( b ) V / A ( c ) V / m ( d ) N o u n i t

3 . . B r e w s t e r a n gl e Θ i s gi ve n by ( a) Tan Θ =S q r t ( ∈ 1 / ( ∈ 1 + ∈ 2 ) ) ( b ) Tan Θ =S q r t ( ∈ 2 / ∈ 1 ) ( c ) Tan Θ =S q r t (( ∈ 1 + ∈ 2 ) / ∈ 1 ) ( d ) Tan Θ =S q r t ( ∈ 1 / ∈ 2 )

4 . . E l e c t ri c an d m ag n e t i c fi e l d s w h i ch ar e p ar a l l e l ( a) C o n s t i t u te i n fi n i t e p owe r fl ow ( b ) C o n s t i t u te u n i t m a gn i t u d e p owe r fl ow ( c ) D o n ot c on s ti t u t e a ny p owe r fl ow ( d ) C o n s t i t u te a p owe r fl ow

5 . T h e m ag n e t i c fi e l d a t t h e s u r f a c e o f a g o o d c on d u c to r i s 2 A /m . T h e f r e q u e n c y of t h e fi e l d i s 6 00 M H z . T h e s u rf ac e r m s c u rr e nt d e n s i ty i s ( a) 2 A / m 2 ( b ) 1 /2 A / m ( c ) 2 A / m ( d ) 1 /2 A / m 2

6 . At t h e s u rf ac e o f a p e r f e c t c o n d u c t or ( a) Tan g e nt ia l c om p o n e nt s o f E i s z e r o ( b ) N o rm a l c om p o n e nt s o f D i s z e ro ( c ) Tan g e nt ia l c om p o n e nt s o f H i s z e r o ( d ) N o rm a l c om p o n e nt s o f E i s z e r o

7 . T h e e q u i p h as e s u r f a c e s p r og r e s s e s a l on g t h e g u i d e w i t h a ve l o c i ty ( a) ss / ω ( b ) ω / ss ( c ) d ω / d ss ( d ) L i ght ve l o c i ty

8 . C u t - o ff f r e qu e n c y i s a f r e q u e n c y b e l ow w h i ch ( a) Z g = 0 ( b ) β = 0 ( c ) α = 0 ( d ) β = α = 0

9 . T h e at t e nu at i o n c o n s t a nt f or a T E M m o d e of p r op a ga t i on i s ( a) L ow ( b ) Z e ro ( c ) H i g h ( d ) I n fi n i ty

1 0. W h e n f re qu e n c y ap p r o ach i n g i n fi n i ty, th e wave i m p e d an c e o f T E an d T M wave s b e twe e n p ar a ll e l c o n d u c t i n g p l at e s ( a) A p p r oa ch e s η ( b ) A p p r oa ch e s i n fi n i ty ( c ) A p p r oa ch e s 1 / η ( d ) A p p r oa ch e s z e r o

1 1. I n a c oa x i al t ra n s m i s s i on l i n e e l e c tr i c an d m ag n e t i c fi e l d s a re ( a) N o t C o n fi n e d t o d i e l e c t r i c me d i u m ( b ) C o n fi n e d t o t h e o u t e r c o n d u c t or ( c ) C o n fi n e d t o a d i e l e c tr i c m e d i u m ( d ) C o n fi n e d t o t h e i n n e r c on d u c to r

1 2. I n a tr a n s m i s s i o n l i n e t h e vol t a ge a n d c u r r e nt s t an d i n g wave s a re ( a) 2 70 0 o u t of p h a s e a l on g t h e l i n e ( b ) 0 0 o u t of p h a s e a l on g t h e l i n e ( c ) 9 0 0 o u t of p h a s e a l on g t h e l i n e ( d ) 1 80 0 o u t of p h a s e a l on g t h e l i n e

1 3. Fo r a l ow l o s s l i n e t h e p h a s e ve l o c i ty i s ( a) A p p r ox i m a te l y c on s ta nt ( b ) I n c r e a s e s w i t h f re qu e n c y ( c ) D e c r e a s e s w i t h f r e q u e n c y ( d ) I n c r e a s e s w i t h s qu a r e o f f re qu e n c y

1 4. I n a c ont i nu ou s l y l oa d e d c ab l e ( a) α d e c r e a s e s u n i f o rm l y w i t h i n c r e a s e i n f r e q u e n c y ( b ) α i n c r e a s e s u n i f or m l y w i th i n c r e as e i n f r e q u e n c y ( c ) α i n c r e a s e s u n i f or m l y w i th d e c r e a s e i n f r e q u e n c y ( d ) α d e c r e a s e s u n i f o rm l y w i t h d e c r e a s e i n f r e q u e n c y

1 5. A t ra n s m i s s i on l i n e op e r at i n g a t 1 G H z h as L = 1 m i c r o h e n r y / m , C = 1p F / m , R = G = 0. T h e n i t s ch ar a c te ri s ti c a d m i tt a n c e i s ( a) 0 . 1 m h os ( b ) 1 0 m h os ( c ) 0 . 01 m h o s ( d ) 0 . 00 1 m h os

1 6. T h e m ax i mu m p owe r t r an s f e r i s p os s i b l e w h e n ( a) Tra n s m i s s i on l i n e i s m at ch e d w i t h t h e l o ad ( b ) Tra n s m i s s i on l i n e i s s h o rt c i rc u i te d ( c ) Tra n s m i s s i on l i n e i s op e n c i r c u i t e d ( d ) Tra n s m i s s i on l i n e i s c on n e c t e d t o a l oa d w h i ch i s n ot e qu a l t o Z 0

1 7. w h e n th e l e n g t h o f a l i n e i s a n i nt e g ra l mu l t i p l e s of λ / 2 th e n Ta n β l i s e q u a l t o ( a) T wo ( b ) Z e ro ( c ) I n fi n i ty ( d ) U n i ty

1 8. T h e u p p e r h a l f o f th e s m i t h ch a r t r e p re s e nt s ( a) r ( b ) ± j x ( c ) - j x ( d ) + j x

1 9. I n a s t u b m at ch i n g i t i s m o re c o nve n i e nt t o s o l ve t h e p r o b l e m u s i n g ( a) R e s i s t a n c e ( b ) R e ac ta n c e ( c ) A d m i t t an c e ( d ) I m p e d an c e


2 0. Fo r a q u ar t e r wave t r an s f o r m e r β l i s e q u a l t o ( a) π / 2 ( b ) π ( c ) 2 π ( d ) π / 4


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