High Current Coil with Five Turns
3B SCIENTIFIC® PHYSICS
Coil with 5 turns 8497320
Instruction sheet
08/ALF
1 Coil with 5 turns
2 Insulating sleeve
3 Clamping device
4 Contact pins
5 Wooden handle
1. Safety instructions
When using the coil with 5 turns, extremely high
temperatures are generated during the course of
the experiments.
Caution: during spot welding experiments, sparks
may jump from glowing metal droplets. Caution:
As a result of the action of gravity, the glowing part
of the melting nail drops downwards in the experiment requiring the melting of a nail.
• Conduct the experiment on a heat-resistant
surface.
• After completing the experiment, allow the
apparatus to cool for at least 5 minutes.
• Always switch off the primary voltage before
undertaking any assembly/set-up work on the
transformer.
• Limit the duration of the experiment to a
maximum of approximately 30 seconds.
2. Description
The coil with 5 turns is used as a secondary coil in a
high-current transformer in experiments to demonstrate the application of Joule heat.
The coil consists of a copper wire which has been
wound around an insulating sleeve in 5 turns. The
extended ends of the coil are fitted with wooden
handles. The contact pins are held in place with
the help of a clamping device.
3. Technical data
Secondary side of the high-current transformer
Short-circuit current: 350 A approx.
Open-circuit voltage: 2.4 V approx.
Number of turns: 5
Wire gauge: 28.25 mm
2
Material: Copper
4. Sample experiments
In order to conduct the experiments, the following
apparatus is additionally required:
1 Mains coil 8497420
1 Transformer core
with yoke and clamps 8497180
1 Set of sheet metal strips 8497330 or
1 Set of nails 8497331
1
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