Maximum power loss occurs during_________________?

Related Mcqs:

1. 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

2. 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

3. The maximum di/dt in a SCR is____________?

   A. Directly proportional to supply voltage
   B. Directly proportional to inductance in the circuit
   C. Inversely proportional to supply voltage
   D. Both A and B

4. During which time maximum conduction spreading take place in the thyristor during turn ON?

   A. Delay time
   B. Spread time
   C. Rise time
   D. Same for every case

5. Maximum di / dt in a SCR is________?

   A. Directly proportional to Vm of supply voltage
   B. Inversely proportional to Vm of supply voltage
   C. Inversely proportional to L in the circuit
   D. Both A and C

6. The maximum firing angle in the half wave controlled regulator is_____________?

   A. 180 degree
   B. 190 degree
   C. 200 degree
   D. 210 degree

7. With gate open, the maximum anode current at which SCR is turned off from ON condition is called____________?

   A. breakdown voltage
   B. peak reverse voltage
   C. holding current
   D. latching current

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. 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

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