Power Transistor - Power Electronics MCQs

"Power Transistor - Power Electronics MCQs" is a valuable resource designed to enhance your understanding of power transistors in power electronics. This collection of multiple-choice questions covers essential topics such as the working principles, characteristics, and applications of power transistors like BJT, MOSFET, and IGBT in power electronics circuits. Ideal for students, engineers, and professionals, these MCQs help improve exam preparation and deepen your knowledge in areas like switching devices, power conversion, and amplifier design. Strengthen your expertise in power electronics with this focused MCQ set on power transistors.

                                    

 1. In a power transistor, the IB vs VBE curve is
a) a parabolic curve
b) an exponentially decaying curve
c) resembling the diode curve
d) a straight line Y = IB


Answer: c
Explanation: The B-E junction of a BJT resembles a p-n junction diode, hence the curve.

2. For a power transistor, if the base current IB is increased keeping VCE constant, then
a) IC increases
b) IC decreases
c) IC remains constant
d) none of the mentioned

(Ans Please Comment me I Don't Know.)

3. The forward current gain α is given by
a) IC/IB
b) IC/IE
c) IE/IC
d) IE/IB
Answer: b
Explanation: Collector current by emitter current is the current gain, its value is close to one but never greater than.

4. The value of β is given by the expression
a) IC/IB
b) IC/IE
c) IE/IC
d) IE/IB

Answer: a
Explanation: Collector current by the base current is beta, its value is in the range 50 to 300.

Signals & Systems MCQs

Power System MCQs

Electrical Machine Design MCQs

Electromagnetic Theory MCQs

Embedded Systems MCQs

5. A power BJT is used as a power control switch by biasing it in the cut off region (off state) or in the saturation region (on state). In the on state
a) both the base-emitter & base-collector junctions are forward biased
b) the base-emitter junction is reverse biased, and the base collector junction is forward biased
c) the base-emitter junction is forward biased, and the base collector junction is reversed biased
d) both the base-collector & the base-emitter junctions are reversed biased

Answer: a

Explanation: When base-emitter & base-collector junctions are forward biased only than both the p-n junctions are forward biased and the device is on.

#PowerTransistor #PowerElectronics #MCQs #ElectronicsQuiz #TransistorTheory #PowerDevices #ElectronicsEngineering #CircuitDesign #PowerConversion #ElectronicsMCQs #TransistorApplications #PowerElectronicsMCQ #EngineeringEducation #ElectronicsTest #PowerElectronicsFundamentals #TransistorBasics #ElectricalEngineering #MCQPractice #PowerElectronicsQuestions #TransistorKnowledge