Question: A student makes a short electromagnet by winding 300 turns of wire around a wooden cylinder of diameter d = 5.0 cm. The coil is

A student makes a short electromagnet by winding 300 turns of wire around a wooden cylinder of diameter d = 5.0 cm. The coil is connected to a battery producing a current of 4.0 A in the wire.

(a) What is the magnitude of the magnetic dipole moment of this device?

(b) At what axial distance z > d will the magnetic field have the magnitude 5.0μT (approximately one-tenth that of Earth's magnetic field)?

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a The magnitude of the magnetic dipole moment is given by uNiA where N ... View full answer

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