E&M > Magnetic Fields and Forces > Magnetic Fields DCS# 5H15.40

MAGNETIC FIELD OF A COIL OF WIRE

magnetic field of a coil

APPARATUS
coil of wire 202-20-A
4 A DC power supply 202-08-D
key switch
101-09-D4
probe with compass needle 202-20-D
document camera
201
terry cloth rag
202-20-A


DESCRIPTION
With the power supply set to about 4 A, probe the coil with the compass needle to show the shape of the magnetic field.

NOTES

Focus the camera on the plane through the center of the coil.

The coil is delicate.  Support it on the terry cloth rag for both the demo and when in storage.

number of turns =  42 turns
solenoid length  = 14.5 cm
solenoid radius = 6.5 cm