Which of following is not a power transistor?

Related Mcqs:

1. Compared to transistor, _________ have lower on state conduction losses and higher power handling capability?

   A. TRIACs
   B. Semi conductor diodes
   C. MOSFETs
   D. Thyristor

2. Power transistor are type of___________?

   A. B.JTs
   B. MOSFETs
   C. IGBTs
   D. All of above

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

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

4. Power electronics essentially deals with control of a.c. power at____________?

   A. Frequencies above 20 kHz
   B. Frequencies above 1000 kHz
   C. Frequencies less than 10 Hz
   D. 50 Hz frequency

5. For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?

   A. 111.9 Ω.
   B. 11.19 Ω.
   C. 108 Ω.
   D. 115 Ω

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

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

7. The power demand can be estimated approximately by___________?

   A. Load survey method
   B. Mathematical method
   C. Statistical method
   D. Economic parameters

8. Electrical power output in a d.c. generator is equal to____________?

   A. Electrical power developed in armature – copper losses
   B. Mechanical power input – iron and friction losses
   C. Electrical power developed in armature – iron and copper losses
   D. Mechanical power input – iron and friction losses – copper losses

9. In a square – wave operation of 3 phase CSIs, the power values are on for___________?

   A. 60 degree
   B. 90 degree
   C. 120 degree
   D. 150 degree

10. The power demand can be estimated approximately by____________?

    A. Load survey method
    B. Mathematical method
    C. Statistical method
    D. Economic parameters