The circuit below is representing the circuit on paper:
If everything is placed in the correct position then the green diode will turn on!
After we made sure that the
circuit was operating properly we then experimented by holding the tip of the
wires with our fingertips and allowing the current to flow through our
hand!
In order to get a more precise
understanding on how a transistor works we experimented further...
Notice that R1+R2 = R3+R4, therefore
the potential on the base of the transistor should be halfway between the two
extremes. We tested this theory by using a potentiometer to test amps passing
through A1 and A2. The data chart below shows our results:
Graph showing the linear relationship
with a positive slope:
From this graph we can say that the
current emerging from the emitter of the transistor through A2 is fairly
constant with A1. We know that the ratio of the current coming out of the
emitter is called the beta value; therefore the transistor's amplifying power
is 5.93.
This transistor is acting both as a
resistor and an amplifier!
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