The power demand can be estimated approximately by___________?

Related Mcqs:

1. The power demand can be estimated approximately by____________?

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

2. In a full wave rectifier, the rectification ratio is approximately equal to____________?

   A. 61%
   B. 71%
   C. 81%
   D. 91%

3. 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

4. To meet high current demand we use SCRs in______________?

   A. series connection.
   B. parallel connection.
   C. anti parallel connection.
   D. both B and C.

5. 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

6. Maximum power loss occurs during_________________?

   A. delay time
   B. rise time
   C. spread time
   D. all

7. Which of following is not a power transistor?

   A. IGBTs
   B. COOLMOS
   C. TRIAC
   D. SITS

8. 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

9. In EMC signal, the source delivers maximum power to the input of transmission line when the transmission line input impedance

   A. Is equal to the source resistance
   B. Greater than the source resistance
   C. Smaller than the source resistance
   D. None of these

10. 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