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MCQEasyJEE Main 2026 · 21 January, Shift 1Characteristics of EM Waves

Physics Question from JEE Main 2026 · 21 January, Shift 1

The electric field in a plane electromagnetic wave is given by : Ey=69sin⁡[0.6×103x−1.8×1011t]E_y = 69 \sin[0.6 \times 10^3 x - 1.8 \times 10^{11} t] V/m\text{V/m}. The expression for magnetic field associated with this electromagnetic wave is _____ T\text{T}.

  • A

    Bz=2.3×10−7sin⁡[0.6×103x−1.8×1011t]B_z = 2.3 \times 10^{-7} \sin[0.6 \times 10^3 x - 1.8 \times 10^{11} t]

  • B

    By=69sin⁡[0.6×103x+1.8×1011t]B_y = 69 \sin[0.6 \times 10^3 x + 1.8 \times 10^{11} t]

  • C

    Bz=2.3×10−7sin⁡[0.6×103x+1.8×1011t]B_z = 2.3 \times 10^{-7} \sin[0.6 \times 10^3 x + 1.8 \times 10^{11} t]

  • D

    By=2.3×10−7sin⁡[0.6×103x−1.8×1011t]B_y = 2.3 \times 10^{-7} \sin[0.6 \times 10^3 x - 1.8 \times 10^{11} t]

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