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BITSAT 2023Paper 2

Exam: BITSAT
Year: 2023
Paper: Paper 2
Subject: Physics
Chapter: Electromagnetic Waves

BITSAT 2023 · Paper 2 · Physics · Electromagnetic Waves

If E and K represent electric field and propagation vectors of the...

If

\overrightarrow{\mathrm{E}}

and

\overrightarrow{\mathrm{K}}

represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field vector is given by: (\omega

- angular frequency) :

Options

A $\frac{1}{\omega}(\overrightarrow{\mathrm{K}} \times \overrightarrow{\mathrm{E}})$
B $\omega(\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{K}})$
C $\omega(\overrightarrow{\mathrm{K}} \times \overrightarrow{\mathrm{E}})$
D $\overrightarrow{\mathrm{K}} \times \overrightarrow{\mathrm{E}}$

Correct answer

A. $\frac{1}{\omega}(\overrightarrow{\mathrm{K}} \times \overrightarrow{\mathrm{E}})$

Step-by-step solution

For an EM wave

\overrightarrow{\mathrm{B}}=\frac{1}{\omega}(\overrightarrow{\mathrm{K}} \times \overrightarrow{\mathrm{E}})

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