The electric field portion of an electromagnetic wave is given by (all variables in SI units) E = 10 - 4 sin ⁡ 6 × 10 5 t - 0.01 x . The frequency f and the speed v of electromagnetic wave are

ω = 6 × 10 5 = 2 π f f = 6 2 π × 10 5 = 3 π × 10 5 Hz = 300 π × 10 3 Hz = 300 π kHz Wave speed = ω k = 6 × 10 5 0.01 = 6 × 10 7 m / s

Physics - EM Waves Question with Solution | TestHub

PhysicsEM WavesElectromagnetic wavesEasy2 minPYQ_2020

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The electric field portion of an electromagnetic wave is given by (all variables in $SI$ units) $E = 10^{- 4} \sin (6 \times 10^{5} t - 0.01 x) .$ The frequency $(f)$ and the speed $(v)$ of electromagnetic wave are

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Answer:

Solution:

$ω = 6 \times 10^{5} = 2 π f$

$f = \frac{6}{2 π} \times 10^{5} = \frac{3}{π} \times 10^{5} Hz$

$= \frac{300}{π} \times 10^{3} Hz$

$= \frac{300}{π} kHz$

Wave speed $= \frac{ω}{k}$

$= \frac{6 \times 10^{5}}{0.01} = 6 \times 10^{7} m / s$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:EM WavesSubtopic:Electromagnetic waves

⏱ 2mℹ️ Source: PYQ_2020

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