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triniman
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Hi all, besides the filament bulb what other devices are considered to be non ohmic??
A non-ohmic device is an electronic component or material that does not follow Ohm's Law, which states that the current through a conductor is directly proportional to the voltage applied, as long as temperature and other factors remain constant. In other words, the resistance of a non-ohmic device is not constant and can change with varying voltage or current.
Some common examples of non-ohmic devices include diodes, transistors, and thermistors. These devices have varying resistance depending on the voltage or current applied.
Non-ohmic devices can significantly impact circuit performance because they do not follow Ohm's Law, which is the basis for many electrical calculations and designs. They can cause voltage and current fluctuations, leading to instability or failure in a circuit.
In a circuit diagram, non-ohmic devices are typically represented by a symbol that differs from the standard resistor symbol. For example, a diode is represented by a triangle with a line through it, and a transistor is represented by three arrows pointing in different directions.
To identify non-ohmic devices in a circuit, you can use a multimeter to measure the resistance at different voltage or current levels. If the resistance varies significantly, the component is likely a non-ohmic device. Additionally, researching the component or consulting a circuit diagram can also help identify non-ohmic devices.