Asked by Steven
A long straight vertical wire of diameter 2.0mm carries a steady current upwards. At 30mm from the centre of the wire, the magnetic field strength is 0.10mT. Sketch a graph to show the variation of magnetic field strength from the wire surface to a distance of 40mm from the centre of the wire. Calculate the magnetic field strength at
(a) the surface of the wire,
(b) 40mm from the centre of the wire.
(a) the surface of the wire,
(b) 40mm from the centre of the wire.
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