Question

A plane electromagnetic wave 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 = Vm⁻¹
along y – direction. Its corresponding magnetic filed component, B would be:
(A) 2 × 10⁻⁸ T along z- direction
(B) 6 × 10⁻⁸ T along x- direction
(C) 6 × 10⁻⁸ T along z- direction
(D) 2 × 10⁻⁸ along y- direction

Answer 1

The corresponding magnetic filed component, B would be B = 2 x 10^6-8  T along z direction.

Option (A) is correct.

Explanation:

The direction of propogation of an EM wave is direction of   E  ×  B  .

i ^  =  j ^  ×  B^

B ^ =  k ^

C = E / B

=> B = E / C = 6 /  3 x 10^8

B = 2 x 10^6-8  T along z direction.

Thus the corresponding magnetic filed component, B would be B = 2 x 10^6-8  T along z direction.

Answer 2

Answer:

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