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

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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

Recommended explanations on Physics Textbooks

Nuclear Physics

Fundamentals of Physics

Kinematics Physics

Linear Momentum

Force

Magnetism

Study anywhere. Anytime. Across all devices.

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?