In the case of forward biasing of a $PN-$ junction,which one of the following figures correctly depicts the direction of flow of charge carriers?

The curve between charge density $\rho$ and distance $r$ near a $p$ - $n$ junction is best represented by

$A$ junction diode has a resistance of $50 \, \Omega$ when forward biased and $5000 \, \Omega$ when reverse biased. The current in the arrangement shown in the figure will be

Suppose the thickness of the depletion layer in a $P-N$ junction is $10^{-6} \ m$ and the value of the depletion barrier is $0.1 \ V$. Then the electric field is ....... $V \ m^{-1}$.

In the given circuit, the current through the battery is ...... $A$.

The change in current through a junction diode is $12 \, mA$ when the forward bias voltage is changed by $0.6 \, V$. The dynamic resistance is