Which following is a two terminal three layer device?

Related Mcqs:

1. For commutation in three phase PAC, normally balanced three phase voltages VR, VY and VB are connected to the three legs of the converter via______________?

   A. Three inductances
   B. Three capacitances
   C. Three resistance
   D. Three transistors

2. When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?

   A. CB
   B. Snubber circuit
   C. Voltage clamping device
   D. Fast acting current limiting device (FACL fuse)

3. Which of following is normally ON device?

   A. SIT
   B. BJT
   C. TRIAC
   D. IGBT

4. A PNPN device having two gates is ___________?

   A. Diac
   B. Triac
   C. SUS
   D. BCS

5. An SCR is considered to be a semi controlled device because_______?

   A. it can be turned OFF but not ON with a gate pulse.
   B. it conducts only during one half cycle of an alternating current wave.
   C. it can be turned ON but not OFF with a gate pulse.
   D. it can be turned ON only during one half cycle of an AC.

6. Which semiconductor device acts like a diode and two transistor?

   A. UJT
   B. Diac
   C. Triac
   D. SCR

7. Under normal operating condition voltage clamping device offers impedance of_________?

   A. high value.
   B. low value.
   C. zero value.
   D. moderate value.

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

   A. BJT
   B. Power MOSFET
   C. Schottky diode
   D. Microwave transistor

9. A modern power semiconductor device that combines the characteristic of BJT and MOSFET is_____________?

   A. IGBT
   B. FCT
   C. MCT
   D. GTO

10. LISN is a device used to measure conducted emissions. LISN stands for_____________?

    A. Line integrated stabilization network
    B. Line impedance stabilization network
    C. Line integrated stored network
    D. Laser integrated stabilization networking