JEE Main 2026 · 6 Apr · Shift 2 · Physics Q31

← JEE Main 2026 · 6 Apr · Shift 2

PhysicsSingle correct+4 / -1Question 31 of 75

For an electromagnetic wave propagating through vacuum, $\vec k$ , $\vec E$ and $\omega$ represent propagation vector, electric field and angular frequency, respectively. The magnetic field associated with this wave is represented by :

\dfrac{\vec E\times\vec k}\omega

\dfrac{\vec k\times\vec E}\omega

\omega\left(\vec E\times\vec k\right)

\omega\left(\vec k\times\vec E\right)

Answer and worked solution

Official answer: B

Faraday's law for a plane wave. $\vec k\times\vec E=\omega\vec B$ , so
$\vec B=\frac{\vec k\times\vec E}\omega.$

(B)

Topics:Properties of EM waves

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JEE Main 2026 · 6 Apr · Shift 2, Physics question 31