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The electric field strength in the region 0<x<5,0<y<π/12, 0<z<0.06 m in free space is given by
E = C sin(12y) sin (a*z) cos (2 10¹0 t) ax V/m. Starting from the relation,
V x E.
use Maxwell's equations to find a numerical value fora, if a is known to be greater than 0.

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