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

Related Mcqs:

1. 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...

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

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

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

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

4. A power MOSFET has three terminals called___________?

   A. Collector, emitter and gate B. Drain, source and gate C. Drain, source and base D. Collector, emitter and base...

5. Power transistor are type of___________?

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

6. 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...

7. AC power in a load can be controlled by using____________?

   A. Two SCR’s in parallel opposition B. Two SCR’s in series C. Three SCR’s in series D. Four SCR’s in series...

8. 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...

9. 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...

10. The power demand can be estimated approximately by____________?

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