AIM: To investigate the variable resistor for transistor regulating circuit.

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

                                                     Table 2
                                                       
                    

1.  Use the multimeter to measure the resistance of the potentiometer at 0.5   kΩ.
2.  Switch on the power supply, measure and record the corresponding values  of current (mA) and voltage (V) in Table 2.
3.  Switch off the power supply.
4.  Repeat step(e) for the other values of RB in Table 2.
5.  Comment briefly on the:

              (i) voltage and current readings;
              (ii) input and output voltages.