Power Electronic Introduction

What is converter?

• Power electronics circuits convert one type or level of a frequency waveform to another

• Power electronics circuits convert two type or level of a frequency waveform to another

• Power electronics circuits convert one type or level of a voltage or current waveform to another

• Power electronics circuits convert two type or level of a harmonic waveform to another

A researcher wants to use resources generated by solar panels to power his/her home applications, such as refrigerators, lights and fans.

Which type of converter is recommended to him/her.

• AC-DC converter

• AC-AC converter

• DC-AC conveter

• DC-DC converter

What the purpose of Low Pass Filter?

• are used to regulate voltage in a circuit.

• are used to filter noise from a circuit.

• are used to turn-on or turn-off switch in a circuit.

• are used to boost the current in a circuit.

For maintaining the high efficiency and high regulation in a circuit, what device is recommended for circuit designers?

• Converter

• Voltage Divider

• Inverter

• Switch

Which is not Family for Thyristor?

• SCR

• Diode

• GTO

• MCT

Circuit designer wants control the turn-on and turn-off of a application. What type of equipment does a circuit designer need?

• GTO

• Triac

• SCR

• MOSFET

What is trr in the idealized current-voltage characteristics?

• The time it takes for the diode to get the current to 0A.

• The temperature of the diode in the forward reaction.

• The temperature of the diode in the reverse reaction.

• The time takes by the diode to obtain good performance.

Which is a WRONG statement?

• Diode is a controllable device.

• Thyristor has three terminals.

• SCRs are constructed from silicon.

• TRIAC is a bidirectional device.

Which is a current controlled device?

• IGBT

• JFET

• MOSFET

• BJT

Which of the following is NOT a power device's selection requirement for particular application?

• Voltage level

• Current Level

• Switching speed

• Moment