Physics · 2021
JEE Main · 27 August 2021, Shift 1 · Q15
Electric field in a plane electromagnetic wave is given by E =50 sin (500 x-10 × 10^10 t ) V / m The velocity of electromagnetic wave in this medium…
Electric field in a plane electromagnetic wave is given by
$$\mathrm{E}=50 \sin \left(500 x-10 \times 10^{10} \mathrm{t}\right) \mathrm{V} / \mathrm{m}
$$
The velocity of electromagnetic wave in this medium is : (Given $\displaystyle \mathrm{C}=$ speed of light in vacuum)
Official answer
(1)
$\displaystyle \frac{2}{3} \mathrm{C}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.