The cut-in voltage for silicon diode is approximately

The characteristic curve for a diode is shown in the figure for forward bias mode. The cut-off voltage for this diode is approximately-

The cut-in voltage of a germanium diode is approximately equal to

The cut-in voltage of a germanium diode is approximately equal to

The barrier potential of a silicon diode is approximately.

Shown below is a graph of current versus applied voltage for a diode . Approximately , what is the resistance of the diode for an applied voltage of – 1 V ?