The reading of the ammeter in the following circuit will be in $mA$.

$A$ Zener diode in the circuit shown has a knee current of $5\,mA$ and a maximum allowed power dissipation of $300\,mW$. What are the minimum and maximum load currents that can be drawn safely from the circuit, keeping the output voltage $V_0$ constant at $6\,V$?

In the circuit shown below,the maximum Zener diode current will be $..... \text{mA}$.

Two Zener diodes ($A$ and $B$) having breakdown voltages of $6\, V$ and $4\, V$ respectively,are connected as shown in the circuit below. The output voltage $V_{0}$ variation with input voltage linearly increasing with time,is given by: $(V_{\text{input}} = 0\, V$ at $t = 0)$ (figures are qualitative).

Consider the following statements $A$ and $B$ and identify the correct choice of the given answers.
Statement $A$: The potential barrier of a $PN$ junction lies between $0.1 \, V$ to $0.3 \, V$ approximately.
Statement $B$: $A$ Zener diode is always connected in reverse bias.

An $8\,V$ Zener diode along with a series resistance $R$ is connected across a $20\,V$ supply as shown in the figure. If the maximum Zener current is $25\,mA$ and the load current is negligible, then the minimum value of $R$ will be $\Omega$.