1.

A plane e.m. wave of frequency 30 MHz travels in free space along the x - direction. The electric field component of the wave at a particular point of space and time is E=6Vm^(-1) along y - direction. Its magnetic field component B at this point would be

Answer»

`2xx10^(-8)T" along z - direction."`
`6XX10^(-8)T" along z - direction."`
`2xx10^(-8)T" along z - direction."`
`6xx10^(-8)T" along z - direction."`

Solution :`B=(E )/(c )=(6)/(3xx10^(8))=2xx10^(-8)T`. MOREOVER, WAVE is propagating along x - direction and `VECE` is along the y - direction. Hence, `vecB` must be along z- direction.


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