Power Electronics MCQ #17

171) The on – state voltage drop of IGBT consists of drip across__________?

drift region

collector junction

MOSFET portion

All of the above

172) In dual converters ___________?

One rectifier provides positive current to the source and the other negative current to the load

One rectifier provides positive current to the load and the other negative current

Both rectifiers provide negative current to the load

Both rectifiers provide positive current to the load

173) Which statement is true for bidirectional operation of converters a _________ combination of controllable switch and _______ is used.

series, a diode is used

series, a capacitor is used

parallel, a diode is used

parallel, capacitor is used

174) In rectifiers, load current flow is _________?

Unidirectional

Bidirectional

Non-directional

Either (a) or (b) Non-directional

175) Very large values of modulation index (greater than 3.24) lead to _________?

Trapezoidal AC output voltage

Square AC output voltage

Triangular AC output voltage

Sine AC output voltage

176) Any electrical signal present in a circuit other than the desired signal is known as ________?

Interference

Distortion

Noise

All of these

177) _________ harmonic is not present in single phase VSI.

2nd

3rd

5th

7th

178) A capacitive load in voltage source inverters generates __________ current spikes and can be ________.

Small, reduced by using an inductive filter

Large, increased by using an inductive filter

Small, increased by using an inductive filter

Large, reduced by using an inductive filter

179) The main objective of static power converters is to obtain ____________?

DC output waveform from a DC power supply

AC output waveform from a DC power supply

DC output waveform from a DC power supply

AC output waveform from an AC power supply

180) The control method used for PWM DC-DC converter is ____________?

Current mode control

Voltage mode control

Hysteric control

All of the above

Electrical Article

Power Electronics MCQ #17

Power Electronics MCQ #17 (#171 to #180)

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