The typical time of rising time lies between______________?

Related Mcqs:

1. The typical value of SCR for modern alternator is____________?

   A. 1.5.
   B. 0.5.
   C. 1.0.
   D. 1.2.

2. Typical range of thyristor turn OFF time is______________?

   A. 3 – 10 µs
   B. 3 – 50 µs
   C. 3 – 100 µs
   D. 3 – 500 µs

3. 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

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

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

5. SCRs are used in series to meet_______________?

   A. high current demand
   B. low voltage demand
   C. low current demand
   D. high voltage demand

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

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

7. In the operation and control of both naturally commutated and forced commutated SCR base converter, commutation plays an important role. The converters is / are ___________?

   A. AC – DC
   B. DC – DC
   C. DC – AC
   D. All of these

8. An SCR can be used___________?

   A. as static conductor
   B. for power control
   C. for speed control of dc shunt motor
   D. All of these

9. If energy is taken from the AC side of the inverter and sends it back into the DC side, then it is known as___________?

   A. Motoring mode operation
   B. Braking mode operation
   C. Regenerative mode operation
   D. None of these

10. The effects of EMI can be reduced by_____________?

    A. Suppressing emissions
    B. Reducing the efficiency of the coupling path
    C. Reducing the susceptibility of the receptor
    D. All of these