The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is :

In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be:

A realistic graph depicting the variation of the reciprocal of input resistance in an input characteristics measurement in a commonemitter transistor configuration is :

To get an output of 1 from the circuit shown in figure the input must be :