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Physics - EM Waves Question with Solution | TestHub

PhysicsEM WavesElectromagnetic wavesEasy2 minPYQ_2017

PhysicsEasysingle choice

In an electromagnetic wave in free space the root mean square value of the electric field is $E_{r m s} = 6 V m^{- 1}$ . The peak value of the magnetic field isNEET 2017

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Answer:

Solution:

Speed of electromagnetic wave $c$ is given by, $\frac{E_{r m s}}{B_{r m s}} = c$
$B_{r m s} = \frac{E_{r m s}}{c}$

$= \frac{6}{3 \times 10^{8}}$

$B_{r m s} = 2 \times 10^{- 8}$

$B_{r m s} = \frac{B_{0}}{\sqrt{2}}$

$B_{0} = \sqrt{2} \times B_{r m s}$

$= \sqrt{2} \times 2 \times 10^{- 8}$

$= 2.83 \times 10^{- 8} T$

Stream:NEETSubject:PhysicsTopic:EM WavesSubtopic:Electromagnetic waves

⏱ 2mℹ️ Source: PYQ_2017

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