An EM wave is propagating in a medium with a velocity v→=vi^. The instantaneous oscillating electric field of this EM wave is along +y axis. Then the direction of oscillating magnetic field of the EM wave will be along
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a
-z direction
b
+z direction
c
-y direction
d
-x direction
answer is B.
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Detailed Solution
Velocity of em wave in a medium is given by E→×B→=v→∴ (E^)×(B→)=v^ [∵E→=Ej^( Given )] As i^=j^×k^, So B→=Bk^Direction of oscillating magnetic field of the em wave will be along +z direction.