Lab 5 - Transistor Switching

Transistor Switching

Purpose:

The purpose of this lab is to observe the effects of a transistor in a circuit.

Procedure:

In the first part of this experiment this circuit was set up.

in place of a push button we used our fingers to show that the create enough of a voltage difference to switch the transistor as seen here.

Circuit 1

After setting up that circuit circuit two was set up.

Circuit 2 

Circuit 2

This circuit was set up with a potentiometer in in order to adjust the voltage at the base of the transistor in order to to create a graph to determine it's gain.

Circuit 2

Current was measured ate the base(A1) and exiting the emitter(A2).

These values and resulting graph were obtained.

Based on the graph the beta gain of the transistor is 136.02  if you ignore the points after saturation  which occurs at about 0.2 to 0.4 amps.