Voltage-Current (V-I) Characteristics

Voltage and Current (V-I)characteristics of many devices are useful to know the nature of the device. Here are some V-I characteristics



Resistor

1) Resistor : Its a linear device whose V-I curve is a straight line passing through the origin. It implies that as the voltage increase the current also increases for resistors.





Diode




2) Diode: Diode is a non linear device, which allows the flow of current only in one direction(in forward bias) and does not allow the flow of current in reverse bias condition.


Voltage source








3) Voltage source: It is a non linear device.
Current source














4) Current source: Its a non linear device.









Linear devices are having a straight line passing through the origin.
Non linear devices does not have a line passing through origin.

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