SATHEE: Electromagnetic Waves - Result Question 2

Electromagnetic Waves - Result Question 2

2. An em wave is propagating in a medium with a velocity $\vec{V} = V \hat{i}$ . The instantaneous oscillating electric field of this em wave is along $+ y$ axis. Then the direction of oscillating magnetic field of the em wave will be along

[2018]

(a) $- z$ direction

(b) $+ z$ direction

(d) $- y$ direction

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Answer:

Correct Answer: 2. (b)

Solution:

(b) As we know,

$\begin{aligned} \vec{E} \times \vec{B} = \vec{V} \\ (\hat{E j}) \times (\vec{B}) = V \hat{i} \\ (∵ Electric field vector is along +y axis) \end{aligned}$

So, $\vec{B} = B \hat{k}$

i.e., direction of magnetic field vector is along $+ z$ direction.

Electromagnetic Waves - Result Question 2

2. An em wave is propagating in a medium with a velocity $\vec{V} = V \hat{i}$ . The instantaneous oscillating electric field of this em wave is along $+ y$ axis. Then the direction of oscillating magnetic field of the em wave will be along

Answer:

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Electromagnetic Waves - Result Question 2

2. An em wave is propagating in a medium with a velocity V→=Vi^. The instantaneous oscillating electric field of this em wave is along +y axis. Then the direction of oscillating magnetic field of the em wave will be along

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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2. An em wave is propagating in a medium with a velocity $\vec{V} = V \hat{i}$ . The instantaneous oscillating electric field of this em wave is along $+ y$ axis. Then the direction of oscillating magnetic field of the em wave will be along