The greater the power handled by the power transistor, the

Related MCQs

• A silicon power transistor is operated with a heat sink (θSA = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has θJC = 0.5º C/W, and the mounting insulation has θCS = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and TJmax = 200 ºC?
• Class B operation is provided when the dc bias leaves the transistor biased just off, the transistor turning on when the ac signal is applied.
• The output power of a transistor amplifier is more than the input power due to additional power supplied by
• A class A power amplifier uses transistor(s).
• In class B operation, at what fraction of VCC should the level of VL(p) be to achieve the maximum power dissipated by the output transistor?
• The beta of a power transistor is generally .
• The amount of power dissipated by the transistor is the of that drawn from the dc supply (set by the bias point) and the amount delivered to the ac load.
• The has the hottest temperature in a power transistor.
• A transistor has how many pn junctions?
• In an npn transistor, the majority carriers in the emitter are