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K5-44. Non-Ohmic Device - Light Bulb
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HomeK. Electromagnetic PrinciplesK5. Electrical Properties Of MatterK5-44. Non-Ohmic Device - Light Bulb
K5-44. Non-Ohmic Device - Light Bulb
Purpose
To show the change in resistance of a light bulb with temperature.
Equipment
Mounted light bulb with double-pole double-throw switch and digital meter.
Setup Time
5 minutes.
Images
Description
A 60 watt 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.
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See pagesk1. forces on moving charges
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See pagesk2. electromagnetic induction
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See pagesk3. transformers
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See pagesk4. motors & generators
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See pagesk5. electrical properties of matter
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See pagesk6. electric circuits & instruments
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See pagesk7. rlc circuits
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See pagesk8. electromagnetic waves
-
See pagesk1. forces on moving charges
-
See pagesk2. electromagnetic induction
-
See pagesk3. transformers
-
See pagesk4. motors & generators
-
See pagesk5. electrical properties of matter
-
See pagesk6. electric circuits & instruments
-
See pagesk7. rlc circuits
-
See pagesk8. electromagnetic waves
Physics Lab Demos