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Demos: 6D-03 Step Up or Step Down Transformer


This demonstration allows you to show how voltage can be increased or decreased using a transformer. We have a simple transformer made with coils of 250 and 500 turns. The power source for this demonstration is a Klinger 100 watt power supply which can be adjusted to produce voltages of 2, 4, 6, 8, 10 or 12 volts. Select a voltage on the Klinger power supply and wire it in parallel to a voltmeter to show input voltage. Wire a second voltmeter to the secondary coil to show the output voltage. Place the voltmeters under the document camera so students can see the ratios of the voltages is 2 to 1 which matches the ratio of the turns.

You can show the usefulness of a transformer with this demonstration. Make a simple circuit with a 15 watt incandescent bulb and select a 10 volt power source from the Klinger power supply. When the circuit is completed, the bulb will not light. Now insert the transformer. The circuit now has a power source of 20 volts which is sufficient to light the bulb.

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Last Updated: Jul 23, 2019 10:14 AM

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