A) 0.866
B) 0.5
C) 0.707
D) 0.75
Correct Answer: D
Solution :
\[\operatorname{Phase} difference \phi =\frac{2\pi }{\lambda }\Delta x\] \[\phi =\frac{2\pi }{\lambda }\frac{\lambda }{6}\] \[\phi =\frac{\pi }{3}\] \[\operatorname{I}={{I}_{o}}co{{s}^{2}}\left[ \frac{\phi }{2} \right]\] \[\frac{\operatorname{I}}{{{I}_{o}}}=co{{s}^{2}}\left[ \frac{\pi }{3\times 2} \right]\] \[\frac{\operatorname{I}}{{{I}_{o}}}=co{{s}^{2}}\frac{\pi }{6}\] \[\frac{\operatorname{I}}{{{I}_{o}}}=\frac{3}{4}=0.75\] \[\therefore \cos \frac{\pi }{6}=\frac{\sqrt{3}}{2}\]You need to login to perform this action.
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