Astudent 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 what is the magnitude of the magnetic field a distance of 20.0 cm from the center of this device?
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Astudent makes a short electromagnet by winding 300 turns of wire around a wooden cylinder of diamet...
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