Q.Define quiescent point.

The quiescent point describes the transistor's condition when no signal is applied. …

[!TLDR]

The quiescent point is the no-signal operating point on the load line, $Q(V_{CEQ}, I_{CQ})$.

When a transistor is biased but no input signal is applied, it carries a steady collector current and has a steady collector-to-emitter voltage fixed by the applied DC voltages. This zero-signal condition is represented by a single point on the DC load line, called the quiescent point, operating point or Q point. It is the intersection of the load line with the transistor's output characteri …