EMWT ONLINE 8

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 ) 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 ( 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 i t s ch a r ac te r i s t i c i m p e d a n c e ( d ) 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 .

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 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 u r f a c e ( b ) 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 ( c ) 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 ( 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 . B r e w s t e r a n gl e c on c e p t i s ap p l i c a b l e f or
( a) Pa ra l l e l p ol a r i z at i o n ( b ) E l l i p t i c a l p o l ar i z a t i on ( c ) L i n e a r p ol a r i z a ti o n ( d ) Pe r p e n d i c u l a r p o l a ri z at i on

4 . Poy nt i n g t he or e m i s s t r i c t l y val i d f or
( a) A ny c l o s e d s u r f ac e ( b ) O p e n s u rf ac e on l y ( c ) Fr e e s p a c e ( d ) S p h e r i c a l s u r f a c e on l y

5 . W h e n th e a n gl e of i n c i d e n c e i s e qu a l t o c r i t i c a l a n gl e t h e n t h e a n g l e o f t r a n s m i s s i o n i s
( a) 1 80 0 ( b ) 6 0 0 ( c ) 9 0 0 ( d ) 4 5 0

6 . Fo r t h e wave p r op a g at i o n i n z d i r e c t i on
( a) T h e r e mu s t b e a y c o m p on e nt o f E o r H ( b ) T h e r e mu s t b e a x c o m p on e nt o f E o r H ( c ) T h e r e mu s t b e a x an d y c o m p on e nt s of E or H ( d ) T h e r e mu s t b e a z c o m p o n e nt of E or H

7 . I f f r e q u e n c y i s l e s s t h an c r i ti c al f r e q u e n c y t h e n t h e gu i d e d wave b e twe e n p a ra l l e l c on d u c t i n g p l a n e s
( a) P r o gr e s s e s w i th o u t a ny at t e nu at i o n ( b ) At te nu a t e s l i n e ar l y ( c ) H ave va l u e f o r p h a s e c on s t a nt ( d ) At te nu a t e s e x p on e nt i a l l y

8 . G r o u p ve l o c i ty , p h as e ve l o c i ty an d f r e e s p ac e ve l o c i ty ar e r e l a t e d by
( a) v 2 0 = v g v p ( b ) v 0 = v g / v p ( c ) v 2 0 = 1 /v g v p ( d ) v 0 = v g v p

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 ) B e twe e n p ar a l l e l p l a t e s ( c ) A d i e l e c t r i c fi l l e d wave g u i d e ( d ) A m i c ro s tr i p

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 x / H y ( b ) - E x / H y ( c ) E y / H x ( d ) - E y / H x

1 1. T h e l i n e p a r am e t e r s R, L , G , C a r e
( a) D i s c r e t e ( b ) U n i f o r m l y d i s t r i bu t e d ( c ) L u m p e d ( d ) N o n u n i f o r m ly d i s t ri b u t e d

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 / 2 ( b ) λ / 4 ( c ) λ ( d ) λ / 3

1 3. Fo r a l o s s l e s s l i n e i f Z L = Z 0 , t h e i m p e d a n c e a t a ny p oi nt o n t h e l i n e i s
( a) Z L / Z 0 , ( b ) Z L Z 0 , ( c ) Z 0 ( d ) Z L

1 4. T h e l oa d i n g c o i l s a r e
( a) D i s t r i b u te d i n d u c t or ( b ) D i s t r i b u te d c a p ac i t o r ( c ) L u m p e d i n du c to r s ( d ) L u m p e d c ap a c i t or s

1 5. A l ow l o s s t ra n s m i s s i on l i n e o p e r at i n g a t 10 0 M H z h a s L = 0. 2 5 m i c r o h e n r y/ m , C = 1 00 p F / m . T h e n t h e p h as e c o n s t ant i s
( a) π ( b ) 3 π ( c ) 1 / π ( d ) 2 π

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) C o m p l e x q u ant i ty ( b ) C a p ac i ti ve ( c ) I n d u c t i ve ( d ) R e s i s t i ve

1 7. Q u ar t e r wave tr a n s f o r me r i s
( a) Fr e q u e n c y s e n s i t i ve d e v i c e ( b ) C u r r e nt s e n s i ti ve d e vi c e ( c ) Vo l t ag e s e n s i t i ve d e v i c e ( d ) Powe r s e n s i t i ve d e v i c e


1 8. O n a s m i t h ch a r t f o r x =0 c i r c l e s t h e c e nte r i s a t ( a) ( 0 , ∞ ) ( b ) ( 1, 1 ) ( c ) ( 1, 0 ) ( d ) ( 1 , ± ∞ )

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) Fr e q u e n c y ( b ) S o u rc e i m p e d a n c e ( c ) C h a r ac t e r i s t i c i m p e d a n c e ( d ) L oa d i m p e d an c e

2 0. A c e r ta i n l ow l o s s l i n e h a s Z 0 = 4 00 o h m s . Fo r Z L = 2 00 o h m s , t h e S W R i s
( a) 4 ( b ) 2 ( c ) 1 / 2 ( d ) 1 /3

B B A A C C D A B A B A C C A B B D A B