The direction of nulls for end-fire array of N Isotropic sources sepa – McqOptions

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1.	The direction of nulls for end-fire array of N Isotropic sources separated by /4 is given by ____
A.	( _n=cos^{-1} u2061([ 1 frac{4n}{N}]) )
B.	( _n=sin^{-1} u2061([ 1 frac{4n}{N}]) )
C.	( _n=cos^{-1} u2061([ 1 frac{2n}{N}]) )
D.	( _n=cos^{-1} u2061([ 1 frac{n}{N}]) )
Answer» B. ( _n=sin^{-1} u2061([ 1 frac{4n}{N}]) )

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