In the case of forward biasing of a $p-n$ junction diode,which one of the following figures correctly depicts the direction of conventional current (indicated by an arrow mark)?

The depletion layer consists of

The diode used in the circuit has a barrier voltage of $0.5\,V$ and a maximum power rating of $10\,mW$. What should be the minimum value of resistance $R$ connected in series with the diode?

If no external voltage is applied across a $P-N$ junction,there would be:

$A$ $PN-$ junction has a thickness of the order of

$A$ $p-n$ junction diode can withstand up to $20 \, mA$ current under forward bias. The diode has a potential difference of $0.5 \, V$ across it, which is assumed to be independent of current. What is the maximum voltage of the battery used to forward bias the diode when a resistance of $125 \, \Omega$ is connected in series with it (in $V$)?