Final answer:
The q point for an ideal diode is the operating or threshold voltage level at which the diode starts to conduct, determined by the carrier distribution and potential differences across the p-n junction.
Step-by-step explanation:
To determine the q point of a diode considering it as ideal, we look at the diode's operation where the 'q' represents the charge. In an ideal diode, when forward biased, it has no resistance and there is infinite resistance when reversed biased, so the q point or operating point would be where the diode switches from being non-conductive to conductive. The q point in ideal circumstances can be seen as the threshold voltage level at which the diode starts to allow current flow.
In an electrical circuit, the electric current due to majority carriers can be expressed as Ne-e(V-V1)/kBT. This relation takes into account the Maxwell-Boltzmann distribution and the potential differences across the p-n junction, which means that the q point corresponds to the voltage level V1 overcoming the potential barrier of the diode.