Q.

The magnetic field in a plane EM wave is given by-  B=(100  μT)sin[(2×1015s1)(tx/c)]j^

The equation for electric field is-

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a

E=3×1010  μN/Csin2×1015s1tx/cj^

b

E=100  μN/Csin[(2×1015s1)(tx/c)](k^)

c

E=100  μN/Csin[(2×1015s1)(tx/c)]k^

d

E=3×1010  μN/Csin[(2×1015s1)(tx/c)]-k^

answer is C.

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Detailed Solution

E0=cB0=3×108×100×106=3×1010  μN/C

As the wave is progressing in x-direction and the magnetic field is in y-direction, the electric field will be along -z direction.

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