3B Scientific Equipment Kit “Hysteresis Curve” - Manual (Page 2)

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Subject to technical amendments
• Connect the power supply, coil and ammeter
in series (see Fig. 1).
• Place a core inside the coil.
• Secure the field probe in its retainer so that the
tangential probe is against the coil core.
• Turn on the power supply and increase the
current to the coil until the magnetic flux den-
sity B approaches saturation. Make sure the
current to the coil does not exceed its 3-amp
limit.
• Determine the magnetic field strength H from
the current to the coil I, the number of turns n,
and the length of the coil s.
s
I n
H
⋅
=
• Read the magnetic flux density B from a
teslameter.
• Set the current back to zero, reverse the polar-
ity to the coil and conduct measurements in
the negative current range.
• Plot the magnetic flux density as a function of
the magnetic field strength.
• Repeat the experiment with various iron sam-
ples.
A
max. 3 A
Fig.1 Obtaining a hysteresis curve
Fig. 2 Example of a hysteresis curve