JEE Main 2026 Model Paper 1

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Question : 6 of 75

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A plane electromagnetic wave travelling along the X-direction has a wavelength of 3 mm . The variation in the electric field occurs in the Y-direction with an amplitude 66Vm−1. The equations for the electric and magnetic fields as a function of x and t are respectively :- ( x,t are in S.I unit)

‌Ey=66‌cos‌π×1011(t−‌
x
c
),
‌Bz=2.2×10−7‌cos‌π×1011(t−‌
x
c
)
‌Ey=11‌cos‌2‌π×1011(t−‌
x
c
),
‌Bz=11×10−7‌cos‌2‌π×1011(t−‌
x
c
)
‌Ex=33‌cos‌π×1011(t−‌
x
c
)
‌Bz=11×10−7‌cos‌π×1011(t−‌
x
c
)
‌Ey=66‌cos‌2‌π×1011(t−‌
x
c
),
‌Bz=2.2×10−7‌cos‌2‌π×1011(t−‌
x
c
)

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