Question

Shown below is an experimental set up with a semiconductor diode
(i) identify the experiment
(ii) draw the resulting graph

Answer 1

The experiment indicates that the current flows through the diode only when it is forward biased. Current starts to flow in the circuit when the biasing voltage $\left(V\right)$ reaches the barrier voltage of the diode ($V_{th}$).

From this experiment, we want to see the input characteristic of the diode that how the current flowing through the diode changes with increase in the biasing voltage ($V$).

The graph of $I$ Vs $V$ is shown which indicates that the current does not vary linearly with the voltage. So, diode is a non ohmic conductor.