Question

V-i characteristics (linear and non-linear),

Answer 1

Nonlinear VI Characteristics. A circuit component has a non-linear characteristic if the resistance is not constant throughout and is some function of voltage or current. The diode, for example, has varying resistance for different values of voltage. However, it has a linear characteristic for a narrow operating region

Answer 2

V-I characteristics

Explanation:

V-I characteristics denotes the voltage-current characteristics of a circuit.

A linear V-I characteristic denotes constant resistance. When we plot this graph, the V-I curve will be a straight line passing through the origin. However, this is not ideal situation. An electronic component tends to exhibit linear characteristic only in a particular region. Example, a diode.

 

In general, a circuit component tends to have non-linear characteristic as the resistance is not constant throughout. It will be a function of voltage (V) and current (i). The graph is not a straight line and hence it is called non-linear V-I characteristics.