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For a power transistor, if the base current IB is increased keeping VCE constant, then
Answer: a Explanation: Ic is directly proportional to Ic.
Answer: a
See lessExplanation: Ic is directly proportional to Ic.
In a power transistor, the IB vs VBE curve is
Answer: c Explanation: The B-E junction of a BJT resembles a p-n junction diode, hence the curve
Answer: c
See lessExplanation: The B-E junction of a BJT resembles a p-n junction diode, hence the curve
In a power transistor, _________ is the controlling parameter.
Answer: c Explanation: The base current controls the collector current. Hence, the base current Ib is the controlling parameter.
Answer: c
See lessExplanation: The base current controls the collector current. Hence, the base current Ib
is the controlling parameter.
In a power transistor, ____ is the controlled parameter.
Answer: d Explanation: The collector current is the controlled parameter.
Answer: d
See lessExplanation: The collector current is the controlled parameter.
A power transistor is a _________ device.
Answer: b Explanation: It has three layers p-n-p or n-p-n forming two p-n junctions.
Answer: b
See lessExplanation: It has three layers p-n-p or n-p-n forming two p-n junctions.
Which of the following devices does not belong to the transistor family?
Answer: c Explanation: GTO is gate turn off transistor, it belongs to the Thyristor family. All the other devices belong to the transistor family.
Answer: c
See lessExplanation: GTO is gate turn off transistor, it belongs to the Thyristor family. All the
other devices belong to the transistor family.
.Zener diodes allow a current to flow in the reverse direction, when the
Answer: a Explanation: Zener diode has voltage regulating property. When voltage reaches above a certain value (Zener voltage), current starts to flow in the reverse direction.
Answer: a
See lessExplanation: Zener diode has voltage regulating property. When voltage reaches above
a certain value (Zener voltage), current starts to flow in the reverse direction.
Shown below is the diagram of an ideal super diode. When the input voltage Vin is positive, then the output voltage Vout = ?
Answer: b Explanation: Input is positive, hence it is amplified by the operational amplifier which switches the diode on. Current flows through the load & because of the feedback, the output voltage is equal to the input voltage.
Answer: b
See lessExplanation: Input is positive, hence it is amplified by the operational amplifier which
switches the diode on. Current flows through the load & because of the feedback, the
output voltage is equal to the input voltage.
.In a certain power electronics application, it is required that the voltage at the load terminals is to be kept within a certain range of voltages only. Among the device listed below, which would be the most ideal choice for this application?
Answer: c Explanation: Zener diode is used as a voltage regulating device.
Answer: c
See lessExplanation: Zener diode is used as a voltage regulating device.
In a Schottky diode, the silicon layer acts as a _____________
Answer: b Explanation: The metal acts as the anode and the semiconductor as a cathode.
Answer: b
See lessExplanation: The metal acts as the anode and the semiconductor as a cathode.