Friday, 27 June 2014 14:57

## K5-44: NON-OHMIC DEVICE - LIGHT BULB

• ID Code: K5-44
• Purpose: Show the change in resistance of a light bulb with temperature.
• Description: A 60 watt incandescent light bulb is connected to a switch so that it can be quickly disconnected from the 110 VAC power to an ohmmeter. The resistance of the 60 watt bulb in operation at a high temperature is R = V^2/P = 110^2/60 = 200 ohms. The resistance cold is about 18 ohms. Turn the bulb on, then switch it to the ohmmeter. The resistance starts high and drops quickly as the bulb cools.
• Availability: Available
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• #### K5-02: PIEZOELECTRIC CRYSTAL - AUDIBLE

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• #### K5-03: PIEZOELECTRIC IGNITOR

Show a commercial use for piezoelectricity Read More
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• #### K5-44: NON-OHMIC DEVICE - LIGHT BULB

Show the change in resistance of a light bulb with temperature Read More