For the given circuit,the power across the zener diode is ..... $mW$.

$A$ Zener diode having breakdown voltage $V_z = 6 \, V$ is used in a voltage regulator circuit as shown in the figure. The minimum current required to pass through the Zener to act as a voltage regulator is $10 \, mA$ and the maximum allowed current through the Zener is $40 \, mA$. The maximum value of $R_s$ for the Zener to act as a voltage regulator is (in $\Omega$)

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.

Find the current through the Zener diode in the given circuit. (in $mA$)

An experiment is performed to determine the $I-V$ characteristics of a Zener diode,which has a protective resistance of $R = 100 \,\Omega$ and a maximum power dissipation rating of $P = 1 \,W$. The minimum voltage range of the $DC$ source in the circuit is

Which of the following is heavily doped?