In a $P-N$ junction,avalanche current flows in the circuit when the biasing is:

In an unbiased $P-N$ junction,holes diffuse from the $p-$ region to $n-$ region because

In the given circuit,the input voltage $V_{\text{in}}$ is shown in the figure. The cut-in voltage of the $p-n$ junction diode ($D_{1}$ or $D_{2}$) is $0.6\,V$. Which of the following output voltage $(V_{0})$ waveforms across the diode is correct?

$A$ semiconductor device $X$ is connected in series with a battery and a resistor. $A$ current of $10 \ mA$ is found to pass through the circuit. If the terminals of $X$ are connected in reverse,the current drops to almost zero. $X$ may be

$A$ diode having a potential difference of $0.5\, V$ across its junction,which does not depend on the current,is connected in series with a resistance of $20\, \Omega$ across a source. If $0.1\, A$ passes through the resistance,then what is the voltage of the source (in $, V$)?

The region near the junction of an unbiased $p-n$ junction diode is known as the depletion layer. This layer is depleted of