An em wave is propagating in a medium with a velocity 
. The instantaneous oscillating electric field of this em wave is along 
axis. Then the direction of oscillating magnetic field of the em wave will be along [NEET 2018]
direction
direction
direction
direction
Text Solution
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Here, velocity of EM wave, 
Instantaneous oscillating electric field,
………… (i)
As we know that from vector algebra,
……… . (ii)
Comparing Eqs. (i) and (ii), we get
Where B (say) be the magnitude of magnetic field. Thus, we can say that the direction of oscillating magnetic field of the EM wave will be along +z directios
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