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Calculate the phase velocity of electromagnetic wave having electron density and frequency for D layer, N = 400 electron/ cc, n = 300 kHz –
The correct answer is:
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A uniform but time varying magnetic field B (t) exists in a circular region of radius a is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region.
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Two identical P-N junction may be connected in series with a battery in three ways (fig below). The potential drops across the two P-N junction are equal in-
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