1. AIM: To determine the effect of Zener diode on stabilization of a half-wave
           rectifier output.

   
   
   
   1.   Connect the circuit diagram as shown in Figure 1.
   2.   Ask the Supervisor to check the circuit connection.
   3.   Copy Table 1 into your answer booklet.

Table 2

RL (kΩ)	V(V)	I(mA)
1.0
2.2
3.3
4.7
6.8
8.2
10.0

 

 

 

 

1.   
4. Close switch (sw).
5.   Read and record in Table 2, the voltage (V) and current (I) readings.
6.   Open switch (sw) and replace the 1 kΩ resistor RL with 2.2 kΩ resistor.
7.   Repeat steps (d) to (e).
8.   Repeat step (f), (d) and (e) for other values of RL in Table 2.
9.   Open switch (sw).
10.   Using Table 2, plot a graph of voltage (V) on the vertical axis against

  current (I) on the horizontal  axis

1.   Compare the two graphs drawn in Questions 1 and 2, and deduce the 

  effectiveness of stabilization of the output voltage with and without the 
  Zener diode.
The candidates were expected to connect the circuit as shown, measure and record the values of the voltmeter  and ammeter readings, plot a graph of voltage (V) against current (I), compare the two graphs in Questions 1 and 2 and deduce the effectiveness of stabilization.