The curve between V and I of SCR when anode is positive w.r.t cathode and when anode is negative w.r.t cathode are known as_____________________?

Related Mcqs:

1. SCR will be turned off when anode current is_______________?

   A. < latching current but greater than holding current and gate signal is 0.
   B. less than holding current.
   C. < latching current but greater than holding current and gate signal is present.
   D. both (A) and (B).

2. Anode current in an SCR consists of____________?

   A. holes only
   B. electrons only
   C. either electron or holes
   D. Both electron and holes

3. Anode of an operational SCR is _______________?

   A. Always positive w.r.t cathode
   B. Always negative w.r.t anode
   C. Always positive w.r.t anode
   D. Always negative w.r.t cathode

4. 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

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. The turn-on time of an SCR with inductive load is 20 µs. The puls train frequency is 2.5 KHz with a mark/space ratio of 1/10, then SCR will___________?

   A. Turn on
   B. Not turn on
   C. Turn on if inductance is removed
   D. Turn on if pulse frequency us increased to two times

7. ON state voltage drop across SCR lie between the range_____________?

   A. 0 – 0.5 V.
   B. 0.5 – 1 V.
   C. 1 – 1.5 V.
   D. 1.5 – 2 V.

8. If the anode current is 800 A, then the amount of current required to turn off the GTO is about____________?

   A. 20 A
   B. 200 A
   C. 600 A
   D. 400 A

9. What is used to protect the SCR from over current ________________?

   A. CB and fuse.
   B. Heat sink.
   C. Snubber circuit.
   D. Voltage clamping device.

10. An SCR is made up of silicon because_____________?

    A. silicon has large leakage current than germanium
    B. silicon has small leakage current than germanium
    C. silicon has small leakage voltage than germanium
    D. silicon has large leakage voltage than germanium