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3B Scientific Magnetizing and Demagnetizing Coil User Manual

Page 2

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3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •

www.3bscientific.com

Subject to technical amendment

© Copyright 2008 3B Scientific GmbH

4.2 Magnetising

Put the sample (e.g. iron rod) to magnetize inside
the coil.

Connect the coil to the power supply and apply a
voltage of 12 V DC.

Switch on the coil and wait for a short while. Then
pull the sample slowly from the coil.

The sample should then be magnetised.

4.3 Production of a magnetic field

Set up the coil with a compass needle at one end.

Connect the coil to the power supply and set it to
DC.

Switch on the coil, slowly increase the voltage and
observe the compass needle.

4.4 Demonstration of inductance

Connect the multimeter to the sockets of the coil.

Set the display to “needle position zero centre”.

Set the multimeter to DC voltage reading and
choose a small measuring range.

Move the bar magnet inside the coil and observe
the display of the multimeter.

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