The waves used in telecommunication are

Important Questions on Electromagnetic Waves

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JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 1>Q 17

The frequencies of $\mathrm{X}$-rays, $\mathrm{\gamma }$-rays and ultraviolet rays are respectively $a,b$ and $c$. Then

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 1>Q 18

An accelerated electron would produce

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 1>Q 19

The magnetic field in a plane electromagnetic wave is given by $B_{\mathit{y}}=2 \times {10}^{–7} \sin (0.5 \times {10}^{3}x +1.5 \times {10}^{11} t)$. This electromagnetic wave is

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 1>Q 20

In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by$\hat{\mathrm{k}}$ and  $2\hat{\mathrm{i}}-2\hat{\mathrm{j}}$,  respectively. What is the unit vector along direction of propagation of the wave.

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 1>Q 21

Name the EM wave used for studying crystal structure of solids

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 1>Q 22

The amplitudes of electric and magnetic fields related to each other are

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 1>Q 23

Which of the following is of shortest wavelength?

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 17 - Electromagnetic Waves>Level 2>Q 1

The value of the magnetic field between the plates of a capacitor at a distance of $1 \mathrm{m}$ from the centre where electric field varies by ${10}^{10} \mathrm{V} {\mathrm{m}}^{-1}{\mathrm{s}}^{-1}$ will be