EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>Gujarat Board-2019>Q 4

EASY

12th Gujarat Board

IMPORTANT

Earn 100

For voice communication, cellular phones use which band of the electromagnetic spectrum?

50% studentsanswered this correctly

Important Questions on Electromagnetic Waves

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12th Gujarat Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>Gujarat Board-2019>Q 5

The maximum value of

\vec{E}

in an electromagnetic wave is equal to

1.8 V m^{- 1}

. Thus the maximum value of

\vec{B}

is?

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12th Gujarat Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>Gujarat Board-2019>Q 6

For radiation of

6 GHz

passing through air, the wave number (number of wave) per

1 m

length is?

MEDIUM

12th Gujarat Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>Gujarat Board-2020>Q 7

Dimension of $\frac{1}{μ ε}$ is same as the dimension of _____.( $μ$ =magnetic permeability of the medium, $ε =$ permittivity of the medium)

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12th Gujarat Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 8 - Electromagnetic Waves>Gujarat Board-2020>Q 9

A plane electromagnetic wave of frequency $25 MHz$ travels in free space along the X-direction. At a particular point in space and time, $\vec{E} = 6.3 \hat{j} {Vm}^{- 1}$ . What is $\vec{B}$ at this point?