EAMCET Engineering 2006 Solved Paper

Consider a p−n junction as a capacitor, formed with p and n-materials acting as thin metal electrodes and depletion layer width acting as separation between them. Basing on this, assume that a n−p−n transistor is working as an amplifier in CE configuration. If C1 and C2 are the base-emitter and collector-emitter junction capacitances, then :