Assignment

1. Study the variation of current flowing through the zener diode for different voltages.
2. Calculate the main current I, zener current I_Z and load current I_L in the following circuit. If the supply voltage is increased to 60 volts, what would be the above values?



3. Consider a 5.6 V zener diode is used in Figure (2). Find the current through series resistance (R_S), zener diode and load resistance (R_L). Find the zener current and maximum power rating of the circuit.



4. Calculate voltage across R_S and R_L, and current passing through I_RS, I_Z, and I_RL for the power supply of 10 V (Zener voltage is 7.5 V, Load Resistance = 5 kΩ).
5. A zener diode along with a series resistance is connected across an 18 V supply. Calculate the minimum value of resistance required if the maximum zener current is 100 mA.