A plane electromagnetic wave with frequency of 30 {MHz} travels in free space. At particular point i

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8.Electromagnetic waves

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A plane electromagnetic wave with frequency of $30 {MHz}$ travels in free space. At particular point in space and time, electric field is $6 {V} / {m}$. The magnetic field at this point will be ${x} \times 10^{-8} {T}$. The value of ${x}$ is ..... .

A

$1$

B

$2$

C

$4$

D

$20$

(JEE MAIN-2021)

Solution

$|B|=\frac{|E|}{C}=\frac{6}{3 \times 10^{8}}$

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

$\therefore x=2$

Standard 12

Physics

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