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प्रश्न
The magnetic field of a plane electromagnetic wave travelling in +ve z-direction is described by ______.
पर्याय
`"B"_"y"= "B"_0 sin ("kz")`
`"B"_"y" = "B"_0 sin ("kz" + omega"t")`
`"B"_"y" = "B"_0 sin ("kz" - omega"t")`
`"B"_"y" = "B"_0 sin (2"kz")`
MCQ
रिकाम्या जागा भरा
उत्तर
The magnetic field of a plane electromagnetic wave travelling in +ve z-direction is described by `underline("B"_"y" = "B"_0 sin ("kz" - omega"t"))`.
Explanation:
Both electric and magnetic fields are perpendicular to the wave's propagation direction in an em-wave. As a result, `"B"_"y" = "B"_0sin ("kz" - omega"t")`, where k is the propagation constant and is the angular velocity.
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