Power Electronics Objective Questions – Set 3

Which of following is not a power transistor?

The capacitance of reversed biased junction J₂ in a thyristor is C_J2 = 20 pF and can be assumed to be independent of the off state voltage. The limiting value of the charging current to turn on the thyristor is 16 mA. What is the critical value of dv/dt?

Thyristor is nothing but a

Which of the following is true?

Power transistor are type of

Which of following devices has highest di/dt and dv/dt capability?

A modern power semiconductor device that combines the characteristic of BJT and MOSFET is

COOLMOS device can be used in application up to power range of

If the anode current is 800 A, then the amount of current required to turn off the GTO is about

BCT is used for

Which one is most suitable power device for high frequency (>100 KHz) switching application?

Which semiconductor device acts like a diode and two transistor?

The latching current of SCR is 20 mA. Its holding current will be

IGBT combines the advantages of

A GTO can be turned on by applying

A power MOSFET has three terminals called

Which of following is normally ON device

Dynamic equalising circuit is useful

Compared to transistor, ______________ have lower on state conduction losses and higher power handling capability

Anode current in an SCR consists of

Which of the following is disadvantage of fast recovery diodes?

SITH is also known as

Thermal voltage V_T can be given by

If holding current of a thyristor is 2 mA then latching current should be

Practical way of obtaining static voltage equalization in series connected SCRs is by the use of

The turn-on time of an SCR with inductive load is 20 µs. The puls train frequency is 2.5 KHz with a mark/space ratio of 1/10, then SCR will

A power semiconductor may undergo damage due to

A single phase full bridge inverter can operated in load commutation mode in case load consist of

Which following is a two terminal three layer device?

A thyristor can termed as