An electromagnetic wave travelling in a lossless dielectric medium having a dielectric constant, r=9 , has the electric field, E x=E 0 (kz-2 10 6 t) Vm -1 where E 0 is the amplitude and k is the wave vector. Among the following options, the incorrect choice is:

1. A. The speed of the electromagnetic wave inside the medium is 10 8 ms -1
2. B. The wavelength of the electromagnetic wave inside the medium is 300 m
3. C. The magnetic field is given by the relation B y= B 0 v (kz-2 10 6 t) where v is the speed of the electromagnetic wave inside the medium
4. D. The direction of propagation of the electromagnetic wave is along +z

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