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प्रश्न
How are em waves produced by oscillating charges?
उत्तर
A moving charge produces both electric and magnetic fields, and an oscillating charge produces oscillating magnetic and electric fields. These oscillating electric and magnetic fields with respect to space and time produce electromagnetic waves.
संबंधित प्रश्न
Identify the electromagnetic waves whose wavelengths vary as:
(a) 10–12 m < λ < 10–8 m
(b) 10–3 m < λ < 10–1 m
Write one use for each.
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A wire carries an alternating current i = i0 sin ωt. Is there an electric field in the vicinity of the wire?
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An infinitely long thin wire carrying a uniform linear static charge density λ is placed along the z-axis (figure). The wire is set into motion along its length with a uniform velocity `v = vhatk_z`. Calculate the poynting vector `S = 1/mu_0 (E xx B)`.
The ratio of the magnitudes of the electric field and magnetic field of a plane electromagnetic wave is ______.
