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  • An electromagnetic wave is transporting energy in the negative z direction. At a certain point and certain time the direction of electric field of the wave is along positive y direction. What will

An electromagnetic wave is transporting energy in the negative z direction. At a certain point and certain time the direction of electric field of the wave is along positive y direction. What will be the direction of the magnetic field of the wave at the point and instant?

Option: 1

Negative direction of y


Option: 2

Positive direction of z


Option: 3

Positive direction of x


Option: 4

Negative direction of x


Answers (1)

best_answer

\overrightarrow{\mathrm{B}} \quad \perp \quad \overrightarrow{\mathrm{E}}            

and Direction of propagation is given by
\begin{aligned} & \overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{B}} \\ & \hat{\mathrm{j}} \times \hat{\mathrm{i}}=-k \end{aligned}

So

Hence according to vector cross product magnetic field should be positive x direction 

Posted by

seema garhwal

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