1.

Apparatus is set up to propagate e.m. waves in the x-direction, having wavelength of 6 mm. An electric field of magnitude 33V m^(-1) is applied in y-direction. The suitable equation for magnetic field (as function of x and t) is :

Answer»

`B_(Z)=1.1 XX 10^(-7) sin pi(t- x // c)`
`B_(z)=1.1 xxsin pi (t - x // c)`
`B_(z)=1.1 xx 10^(-7) sin pi xx 10^(11) (t- x // c)`
`B_(z)=1.1 sin 2PI (t- x // c)`

Solution :The equation of magnetic field ALONG z-axis in e.m. wave is
`B_(z)=B_(0)sin omega(t-x // c)`
`=1.1 xx 10^(-7) sin pi 10^(11) (t-x // c)`


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