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Unformatted text preview: l carries a current I . Show that the field strength at its center is 3. (Ch. 30, Example 30.3) A circular loop of radius a carries a current I . Show that the magnetic field along the axis of the loop at a distance z from the center is ( ) 2 3/2 2 2 2 Ia B a z = + Useful equations: ( ) 2 1 2 4 finite, straight wire: sin sin 4 long, straight wire: 2 F IL B I d r dB r I B r I B r = = =-= h h h h h l...
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- Spring '09