EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Electromagnetic Waves>KEAM 2020>Q 1

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KEAM

IMPORTANT

Earn 100

If an electromagnetic wave of frequency $5 MHz$ travels from vacuum into a dielectric medium of electrical permittivity $ε_{r} = 4, then its (take μ_{r} = 1)$

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Important Questions on Electromagnetic Waves

EASY

KEAM

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Electromagnetic Waves>KEAM 2020>Q 2

If

ε_{0}

and

μ_{0}

are respectively the electrical permittivity and magnetic permeability of vacuum, the dimensional formula for

\frac{1}{\sqrt{μ_{0} ε_{0}}}

is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Electromagnetic Waves>KEAM 2019>Q 3

The electric field of an electromagnetic wave in free space is given by $E = 5 \sin (\frac{2 π}{3} z - ω t) \hat{y}$ $V / m .$ Which of the following statements is correct ?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Electromagnetic Waves>KEAM 2018>Q 4

A radio transmitter sends out

60 W

of radiation. Assuming that the radiation is uniform on a sphere with the transmitter at its centre, the intensity

(i n W / m^{2})

of the wave at a distance

12 k m

is

EASY

KEAM

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 29 - Electromagnetic Waves>KEAM 2020>Q 5

Among the following, which is not true for ultraviolet light?