What place should I give an electromagnetic field (produced by a current conducting coil) in the electromagnetic spectrum? What will its wavelength and frequency be?
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is the current alternating or direct? – DavePhD Mar 12 '14 at 17:00
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its direct current – rishi.. Mar 12 '14 at 17:12
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1in that case, there is no radiation, no waves. Wavelength and frequency are undefined. maybe looking at this question would help http://physics.stackexchange.com/q/4637/ – DavePhD Mar 12 '14 at 17:16
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if the current used is alternating then? – rishi.. Mar 12 '14 at 17:22
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For alternating current, the frequency would be the frequency of the current. For example, in the USA, household AC current is 60Hz. The electromagnetic radiation would be an ultra low frequency radio wave.
(wavelength) X (frequency) = speed of light
So 60Hz corresponds to 5000km.
For direct current, there would be no electromagnetic radiation produced by the current.
DavePhD
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