EMWT ONLINE 10

1+
+ . T h e i d e al c o n d u c t i n g b ou n d a r y i s a n a l og ou s t o ( a) O p e n c i r c u i t on th e t ra n s m i s s i on l i n e ( b ) T h e t ra n s m i s s i on l i n e t e r m i n at e d w i t h i t s ch a r ac te r i s t i c i m p e d a n c e ( c ) T h e t ra n s m i s s i on l i n e t e r m i n at e d w i t h a ny l oa d . ( d ) S h o rt c i rc u i t on t h e t r an s m i s s i on l i n e

2 . I n th e c a s e of p e r p e n d i c u l a r p o l ar i z a t i on ( a) T h e E i s p e r p e n d i c u l ar t o t h e p l a n e of i n c i d e n c e an d p ar a l l e l t o t h e r e fl e c ti n g s u rf ac e ( b ) T h e H i s p e r p e n d i c u l a r t o t h e p l a n e o f i n c i d e n c e an d p ar a l l e l t o t h e r e fl e c ti n g s u r f a c e ( c ) T h e H i s Par a l l e l t o t h e p l a n e of i n c i d e n c e an d p e r p e n d i c u l a r t o t h e r e fl e c ti n g s ur f a c e ( d ) T h e E i s p a ra l l e l t o t h e p l an e of i n c i d e n c e an d p e r p e n d i c ul a r t o t h e r e fl e c ti n g s u rf ac e

3 . T h e ga s l as e r u s e s ( a) Tot a l i nte rn a l r e fl e c t i on c on c e p t ( b ) B r e w s t e r e ff e c t ( c ) B o t h B re w s t e r e ff e c t a n d t ot a l i nt e r n al re fl e c t i on c on c e p t ( d ) C r i t i c a l an g l e c on c e p t

4 . T h e u n i t f o r p o i nt i n g ve c t or i s ( a) Wa t t s /m 2 ( b ) Wa t t s /m 3 ( c ) Wa t t s ( d ) Wa t t s /m

5 . I f r e fl e c t i o n c o e ffi c i e nt = - 1 / 2 t h e n t h e s w r i s ( a) O n e ( b ) 1 /3 ( c ) Z e ro ( d ) 3

6 . Fo r u n a t te nu a t e d wave , t h e wave e q u a ti o n i s ( a)  2 E = ss 2 E ( b )  2 E = 1/ j ss 2 E ( c )  2 E = j ss 2 E ( d )  2 E = - ss 2 E

7 . Fo r a z d i r e c t e d T E wave ( a) E z = 0 ( b ) E = 0 ( c ) H z = E z = 0 ( d ) H z = 0

8 . O th e r n am e of T M wave i s ( a) U n i f o r m p l a ne wave ( b ) H wave ( c ) E wave ( d ) E & H wave

9 . T E M wave e x i s t s i n ( a) A h o l l ow wave g u i d e ( b ) A d i e l e c t r i c fi l l e d wave g u i d e ( c ) A m i c ro s tr i p ( d ) B e twe e n p ar a l l e l p l a t e s

1 0. W h e n a wave i s tr ave l i n g i n Z d i re c ti o n , t h e n i t s i mp e d an c e i s gi ve n by ( a) - E y / H x ( b ) E x / H y ( c ) E y / H x ( d ) - E x / H y

1 1. I n s ol v i n g t r an s m i s s i o n l i n e p r o b l e m s we u s e t h e f o l l ow i n g c i r c u i t q u ant i t i e s ( a) E an d H ( b ) D a n d B ( c ) J a n d E ( d ) V a n d I

1 2. I n a tr a n s m i s s i o n l i n e t h e d i s t a n c e b e twe e n two s u c c e s s i ve m i n i m a i s ( a) λ / 4 ( b ) λ ( c ) λ / 3 ( d ) λ / 2

1 3. A l o s s y tr a n s m i s s i o n l i n e ( a) D i s p e r s i ve ( b ) H ave i n fi n i te l os s ( c ) N o n D i s p e r s i ve ( d ) I t mu s t b e a d i s to r ti o n l e s s l i n e

1 4. I f L T a n d C T a re t h e to t al i n d u c t an c e a n d to t al c a p ac i t a n c e of t h e l i ne i n c l u d i n g th e l o ad i n g c o i l s , t h e n i t s c u t o ff f r e q u e n c y i s g i ve n by ( a) 1 / ( 2 π . s q r t (L T C T ) ) ( b ) 1 / ( π . s q r t (L T C T ) ) ( c ) π . s q r t (L T C T ) ( d ) π / s q r t (L T C T )

1 5. I f 10 0 m e t e r l e n g t h t r an s m i s s i o n l i n e h as α = 0 . 05 N p /m , t h e a t t e nu at i on at th e e n d o f th e l i n e ( a) 5 d B ( b ) 4 3. 4 d B ( c ) 5 0 d B ( d ) 3 4. 3 d B

1 6. I f π / 2 < β l < π , t h e i n p u t i m p e d a n c e o f s h or t c i rc u i te d l i n e w i l l b e ( a) I n d u c t i ve ( b ) C o m p l e x q u ant i ty ( c ) C a p ac i ti ve ( d ) R e s i s t i ve

1 7. A s h or t c i r c u i t e d λ / 4 l i n e c a n b e u s e d as ( a) A c ap a c i t or ( b ) A c on d u c t o r ( c ) A n i n s u l at o r ( d ) A n i n d u c to r

1 8. O n a t ra n s m i s s i on l i n e V m a x a n d V m i n a re s e p a r at e d by th e d i s t a n c e o f ( a) λ ( b ) λ / 8 ( c ) λ / 4 ( d ) λ / 2

1 9. I n th e s i n g l e s tu b m at ch i n g t h e l o c a t i on of t h e s t u b ch a n g e s w i th ( a) S o u rc e i m p e d a n c e ( b ) C h a r ac t e r i s t i c i m p e d a n c e ( c ) Fr e q u e n c y ( d ) L oa d i m p e d an c e

2 0. T wo ve r y l o n g l o s s l e s s c ab l e s of ch a r ac te ri s ti c i mp e d an c e s o f 36 oh m s an d 1 00 oh m s r e s p e c t i ve l y a r e t o b e j oi n e d f o r r e fl e c t i o n l e s s t r an s m i s s i on . T h e Z 0 o f a m a tch i n g t r a n s f o rm e r i s ( a) 6 0 oh m s ( b ) 1 00 o h m s ( c ) 1 /3 6 oh m s ( d ) 3 6 oh m s

DABAD DADDB DDABB CCCCA