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K5-41. V-I Curves For Ohmic And Non-Ohmic Devices
Purpose
To illustrate resistive properties of resistors and diodes.
Equipment
Oscillator, shunt resistor, test resistor and diode, oscilloscope with scope/TV cart.
Setup Time
10 minutes.
Images
Description
A signal generator is used as the source of AC current feeding a series circuit with a shunt resistor and one other "test" circuit component, which can be either a resistor or a diode. The current is displayed on the vertical axis of the oscilloscope as the voltage across a shunt resistor. The voltage across the second element (the element under study) is displayed on the horizontal axis. As seen below, the resistor is a linear or "ohmic" device, but the diode is non-ohmic. The breakdown potential of the diode can be observed.
References
Thomas A. Walkiewicz and James R. Kirk, Characteristic Curves, TPT 32, 90-92 (1994).
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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