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Physics - EM Waves Question with Solution | TestHub

PhysicsEM WavesElectromagnetic wavesMedium2 minPYQ_2019

PhysicsMediumsingle choice

The mean intensity of radiation on the surface of the Sun is about $10^{8} W / m^{2} .$ The rms value of the corresponding magnetic field is closest to:

Options:

Answer:

Solution:

$I = \frac{B_{0}^{2}}{2 μ_{0}} \times C$

$B_{0} = \sqrt{\frac{2 μ_{0} I}{C}}$

$B_{r m s} = \sqrt{\frac{μ_{0} I}{C}} = \sqrt{\frac{4 π \times 10^{- 7} \times 10^{8}}{3 \times 10^{8}}}$

$\approx 10^{- 4} T$

Stream:JEESubject:PhysicsTopic:EM WavesSubtopic:Electromagnetic waves

⏱ 2mℹ️ Source: PYQ_2019

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