- Does the value of Beta in an NPN transistor change?
Beta changes according model of the transistor and also temperature.
- What is the quiescent point?
Is the point where the circuit will be naturally with nothing on input
- What is biasing, what does it do?
biasing defines the quiescent point, and the region that transistor will work
- How do I determine the value of the capacitors I use for AC coupling the signal input and output? Up until now, for audio signals I have just been using a 10uF capacitor, is this ok?
The capacitor size depended on the input impedance of next stage, it's a little complex to calculate, 10 uf is a little small will be ok for high frequencies but may attenuate on low frequency using standard transistor.
- How will a load on the output effect the function of the circuit?
Load on output will affect all aspects, and must be considered always
The is understand that transistor have regions to operate, and you must understand that regions