A student makes a short electromagnet by winding 100 turns of wire around a wood

Question

A student makes a short electromagnet by winding 100 turns of wire around a wooden cylinder of diameter d = 2.0 cm. The coil is connected to a battery producing a current of 2.0 A in the wire.
(a) What is the magnetic moment of this device?
______ A·m2

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

Thanks for the help, feel free to check out my other Physics questions on this topic, I have another exam tomorrow so the help would be greatly appreciated!

Explanation / Answer

figured it out myself

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