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Is it necessary whenever there is an electric field there will be a magnetic field in perpendicular direction thus producing em waves if not what is the condition of em wave generation?
Wiki User
∙ 15y ago
A moving charge (such as an electrical current) generates a magnetic field at right angles, true, but this field is stable and unchanging. An EM wave is only produced by a changing movement, for example an AC current. The condition would be that the field will change (and produce a wave) only if the current changes.
Wiki User
∙ 15y ago
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