Zener Diode — Prelims Questions

A Zener diode of $V_Z = 6.0\,\text{V}$ and $P_{Z(max)} = 0.4\,\text{W}$ is used in a voltage regulator circuit. If the input voltage is $10\,\text{V}$ and the load current is $20\,\text{mA}$, what is the minimum value of the series resistance ($R_S$) required to ensure the Zener diode operates safely?

Which of the following statements is TRUE regarding a Zener diode?

A Zener diode has a Zener voltage of $9.1\,\text{V}$. If it is used in a circuit where the input voltage varies from $12\,\text{V}$ to $15\,\text{V}$, and the series resistor is $100\,\Omega$, what is the range of current flowing through the Zener diode if the load current is constant at $10\,\text{mA}$?

Which of the following V-I characteristic curves correctly represents a Zener diode?

A Zener diode with $V_Z = 5.1\,\text{V}$ and $I_{Z(min)} = 2\,\text{mA}$ is used to regulate a $10\,\text{V}$ input voltage. If the load resistance $R_L$ varies from $100\,\Omega$ to $200\,\Omega$, what is the appropriate value for the series resistor $R_S$ to ensure proper regulation?

Which breakdown mechanism in a Zener diode is characterized by the direct pulling of electrons from covalent bonds due to a strong electric field?

A Zener diode has a Zener voltage of $12\,\text{V}$ and a maximum power dissipation of $1.0\,\text{W}$. If it is used in a voltage regulator circuit with an input voltage of $20\,\text{V}$ and a series resistor of $100\,\Omega$, what is the maximum load current ($I_{L(max)}$) that can be drawn from the regulator while maintaining regulation?