3B SCIENTIFIC PHYSICS U8496300 Instructions D'utilisation page 7

•
Disconnect the operating voltage once more
and reverse the polarity of the connecting
leads supplying the operating voltage.
•
Apply 9-12 V voltage and observe the direction
of rotation.
7. Operation as a generator
7.1 Additionally required
Horseshoe magnet
Multimeter, ESCOLA 10
Experiment leads
7.2 Experiment procedure
7.2.1 AC generator
•
Insert the carbon brushes into the sockets
provided in front of the commutator.
•
Insert the horseshoe magnet (which will func-
tion as a stator) into the holding fixture. Take
special care to ensure that the rotor can rotate
freely.
•
Set the voltmeter to DC, set the zero point to
the middle and connect it up.
•
Start turning the crank slowly and observe the
output voltage.
•
Increase the speed of revolution and note the
output voltage.
•
Set the voltmeter to AC and determine the rms
output value.
Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany •
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
U8491810
U8531170
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Subject to technical amendments.
© Copyright 2007 3B Scientific GmbH
7.2.2 DC generator
•
Insert the carbon brushes into the sockets
provided behind the commutator.
•
Insert the horseshoe magnet (which will func-
tion as a stator) into the holding fixture. Take
special care to ensure that the rotor can rotate
freely.
•
Set the voltmeter to DC, set the zero point to
the middle and connect it up.
•
Turn the crank clockwise and note the output
voltage and the pointer deflection.
•
Turn the crank anticlockwise and note the
output voltage and the pointer deflection.
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