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Answer :

When Q-point is at cut off region means it is just above the horizontal axis VCE

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Description : Why the cutoff frequency is taken for 3db?

Description : An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance

Answer : An FET is a better chopper than a BJT because it has lower offset voltage

Description : What is a BJT?

Answer : Bipolar Junction Transistor (BJT): BJT is a Bipolar device. (Uses both electrons and holes charge carrier for current conduction) Two Junctions (Emitter junction & collector ... mode (Current amplification) Cutoff mode (Open switch) Saturation mode (Close switch)

Answer : Yes IGBT is costlier than BJT and MOSFET.

Answer : Yes BJT have internal capacitances.