Transistor Switching

In this lab we are to learn how to use a transistor. We first create the following circuit.

We then demonstrated that the led still glows after removing R2 and completing the circuit with our finger tip. This demonstrates that the transistor responds by amplifying the current applied to the base.

We then add a potentiometer and remove the LED

we collect the following data

A1      0     .1     .2      .31     .44     .58     .75

                                                A2   .  1    34   42.3   47.3   51.6   53.5   54.7

As we can see the transistor amplifies the current but eventually becomes saturated.