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K5-35. Resistors At Ln Temperature
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HomeK. Electromagnetic PrinciplesK5. Electrical Properties Of MatterK5-35. Resistors At Ln Temperature
K5-35. Resistors At Ln Temperature
Purpose
To illustrate materials with both positive and negative temperature coefficients of resistivity.
Equipment
Copper and carbon resistors, liquid nitrogen, digital meter, video camera with monitor.
Setup Time
10 minutes.
Images
Description
Approiximately equal copper and carbon resistors are mounted on plastic mount which can be inserted into liquid nitrogen. When cooled from room temperature to the temperature of liquid nitrogen the resistance of the copper resistor decreases from 15.8 ohms to 2.3 ohms, while the resistance of the carbon resistor increases from 16.0 to 19.7 ohms.
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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