Question 1

AIM: The aim of both experiments is to determine d.c. current gain of a Bipolar Junction Transistor(BJT).

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

Table 1
                                          

1.   Connect the resistor R1 to the 220 k? resistor.
2.   Switch on the power supply unit.
3.   Read and record in Table 1, the current IB  and its corresponding IC. .
4.   Repeat steps (d) to (f) for the other values of resistance in Table 1.
5.   Switch off the power supply unit.
6.   Plot a graph of IC (mA) on the vertical axis and IB (mA) on the 

  horizontal  axis.

1.   Determine the slope of the graph.