To ensure that only dominant mode TE10 is allowed to propagate in an a – McqOptions

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1.	To ensure that only dominant mode TE10 is allowed to propagate in an air filled rectangular waveguide, the lower frequency limit and upper frequency limit are
A.	about 25% above fc for TE10 and 5% below fc for TE20 mode respectively
B.	about 50% above fc for TE10 and 25% below fc for TE20 mode respectively
C.	about 25% above fc for TE10 and 25% below fc for TE20 mode respectively
D.	none of the above
Answer» B. about 50% above fc for TE10 and 25% below fc for TE20 mode respectively

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