Chapter 31: Q. 17 (page 901)

A radio wave is traveling in the negative $y$ -direction. What is the direction of $\vec{E}$ at a point where $\vec{B}$ is in the positive $x$ -direction?

Short Answer

Expert verified

Direction of $\vec{E}$ is in negative $\hat{z}$ direction.

Step by step solution

The travelling direction of electromagnetic waves is depicted in this diagram.

Figure is,

Explanation

The vector of Poynting,

$\vec{S} = \frac{1}{μ_{o}} \vec{E} \times \vec{B}$

The EM wave's path is indicated by this arrow.

$\vec{B}$ is in $\hat{x}$ direction.

$\vec{E}$ should be included inlocalid="1648791112140">-z^direction.

So,

$E \times \vec{B}$ is in direction $- \hat{y}$ .

localid="1648791725580" $\vec{E}$ paints inlocalid="1648791733560" $- \hat{z}$ direction (negative localid="1648791738614" $z -$ direction.)

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A radio wave is traveling in the negative $y$ -direction. What is the direction of $\vec{E}$ at a point where $\vec{B}$ is in the positive $x$ -direction?

Short Answer

Step by step solution

The travelling direction of electromagnetic waves is depicted in this diagram.

Explanation

One App. One Place for Learning.

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A radio wave is traveling in the negativey-direction. What is the direction of E→at a point whereB→is in the positivex-direction?

Short Answer

Step by step solution

The travelling direction of electromagnetic waves is depicted in this diagram.

Explanation

One App. One Place for Learning.

Most popular questions from this chapter

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A radio wave is traveling in the negative $y$ -direction. What is the direction of $\vec{E}$ at a point where $\vec{B}$ is in the positive $x$ -direction?